The A0 pin on the Wemos can only measure voltage up to 1V (higher voltage will damage it). Does this mean that the resulting sensor will be multiplied 3x? If you plan to map all of your consumption, youll have to use clamps for the gray and black wire as well. Grounds on different devices can be at slightly different levels which if not all grounded together will mess up your calculations. TBH I didnt think your setup completely through, but when I saw your 1.10V reading, this immediately reminded me of a similar problem I had getting correct values from that sensor: Im not sure why you are getting the 1.10V even when the light bulb is off, but you should keep in mind, that you may just always see the maximum voltage an ESP32 ADC sensor returns with the attenuation set to default. It is possible to monitor V and A on ESP. (the the alt-energy and RV folk are even worse, saying non-sensicals like amps per day routinely). I assume yours does as well. Omdat die spanning niet uit de Wemos D1 mini of een USB poort komt, moeten we die ook zien te maken. It uses two [op-amp] comparators that select the zero crossing of the voltage (via small voltage transformer) and current (via current transformer) waveforms and XORs them. Powered by Discourse, best viewed with JavaScript enabled, 241657369_402601664555817_2025818614620845078_n, 241669519_551414955927862_566436531863422584_n. lipstick you apply after doesnt change that, no matter how competent you are with those parts. The ESP32 has an attenuator, and setting it to 11db may help. Is it possible to replace 200kohm with 650kohm (I have one at home) multiples I will probably have to calculate from the measured first value? I have not shown how you by your red and black wires power the wemos. update_interval (Optional, Time): The interval You have to tie the back of the battery shield to ground so all grounds are at same level. The Analog To Digital (adc) Sensor allows you to use the built-in So I have used CT Clamp Current Sensor and can read current successfully in HA. The max voltage of it is 4.2V when fully charged even though the battery is meant to be 3.7V. A new version has been release since you last visited this page: 2023.3.0 . FWIW I have a bunch of real KWH meters just like the power company but they are big to deploy, and not user friendly to read. ESPHome and INA219 current sensor seems off by factor of 100. Its VCC pin connects to the 5 V pin of the Arduino, GND pin to GND and the OUT pin connects to the A0 pin. To measure the VCC voltage, set pin: to VCC and make sure nothing is connected to the A0 pin. If its not included, you need at least the correct size burden resistor. Defaults to 1. See Different ESP32-ADC behavior since 2021.11. When the project is completed, Id like to open-source it. (why shouldnt a charger be connected?). two 470uf capacitors are connected at the input and output of the voltage regulator. The RP2040 has an internal temperature sensor that can be used to measure the core temperature. But i2c requires two GPIO pins (data and clock). By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. [08:18:23][D][sensor:092]: adc_sensor: Sending state 0.52344 V with 2 decimals of accuracy Maybe even resistive load like a heating element that has a power factor of (apparent power = active power in that case ). Hi Joe, what external ADC you use ? Core Air Quality Analogue Bluetooth Low Energy (BLE) Digital Signals Distance Electricity Environmental Light Magnetic Miscellaneous Once youve got the CT sensor connected to your microcontroller, the rest really just depends on how far you want to take the software side of things. Learn more, Building A Safe ESP32 Home Energy Monitor, build a very robust DIY energy monitoring system without having to modify your AC wiring, monitoring energy consumption can uncover some surprising trends, and dont have an optically coupled electricity meter, http://beet.the-eye.eu/public/Books/Electronic%20Archive/BuildADigitalWattAndWatt-hourMeter.pdf, https://www.mousa-simple-projects.com/2017/12/power-factor-measurment-using-arduino_18.html, https://www.crowdsupply.com/circuitsetup/split-single-phase-energy-meter/, https://www.nts.com/services/certification/pge/han-devices/, The X Macro: A Historic Preprocessor Hack, Review: XHDATA D-219 Short Wave Radio Receiver, A Hackers Introduction To DIY Light Guide Plates, Hackaday Podcast 210: Living In The Future, Flipper Mayhem, And Samsung Moons The World, This Week In Security: Kali Purple, Malicious Notifications, And Cybersecurity Strategy, Retrotechtacular: Military Graphics In The 1960s, Hackaday Berlin: The Badge, Workshops, And Lightning Talks, Finessing A Soldering Iron To Remove Large Connectors. Crack open any digital power meter that power companies are now using and youll find they now use a CT. CTs have also long been used in metering large power loads. I just dont know when we would want to know the hourly rate of change of power Joules/Second/hour haha. current ( Optional ): Use the current value of the sensor in amperes. Defaults to 60s. All options from John Loeffler has updated the project titled Uno Plus+. can I connect directly to pin A0 3.2V or do I need to install a resistor? Takes me back to the 68705P3 we used for quadrature decoding driving 4 large red 7 segment leds for end stop positioning on press brakes circa 1986, nice chip for the time, the quadrature done by 74c86, cheers. Still they are the gold standard. Defaults to 60s. This will allow me to see it the current is positive or negative (if the house is consuming less that the generated solar panel the current will be negative). Or it can send a wave form subset for processing on a PC. An energy meter is measuring with 20MS/s and up AND is measuring the voltage and can be bought from China for 20 bucks. If your generated voltage from the CT is small enough you wont notice any difference. Source for esphome.io documentation files. FastLED Light. The first step to reducing the energy consumption of your home is figuring out how much you actually use in the first place. The Expandable 6 Channel ESP32 Energy Meter Add-on Board can measure the amount of current being used by 6 circuits at a time! max_current ( Optional, float): The maximum current you are expecting. Now clamp is around my life main wire by power supply. Thanks for the explanation. So I know when the battery is low and can recharge it. Measuring an AC signal from a current transformer was very difficult requiring external Op-amps configured as ideal diodes. Good point! The link you provided is for board that control relays. The Blue wire connects to the metal strip that in in direct contact with the back of the 18650. Nice and simple. id (Optional, ID): Manually specify the ID used for code generation. The A0 pin on the Wemos can only measure voltage up to 1V (higher voltage will damage it). Yes. Thanks Mattias, that with the calculation of the water pressure in bar is correct. sensor (Required, ID): The source sensor to measure voltage values from. Intro Clamp Sensor Energy Monitoring - ESPHome in Home Assistant 17,987 views Oct 29, 2021 349 Dislike Will Surridge Tech 11K subscribers Integrating simple energy monitoring into Home. max_current (Optional, float): The maximum current you are expecting. Now, Id probably go with this: current (Optional): Use the current value of the sensor in amperes. Yes even a MODBUS meter. If you put the 18650 in the wrong way around it could destroy it. This is still my wiring diagram. Woodward has an Interesting circuit. [08:18:28][D][sensor:092]: adc_sensor: Sending state 0.52344 V with 2 decimals of accuracy The INA219 is a current and voltage sensor that you use with any Arduino, ESP8266 or ESP32 microcontroller. Improvements can be made by putting in a drop-in replacement for the 7805, such as the Murata and by adding a 50-60Hz Lowpass or Bandpass filter to suppress any noise in the measurements. Maybe throw some machine learning at the problem of load differentiation. So i have now removed mine. Before this every ESP32 would read different voltages and be largely inaccurate/nonlinear. Adafruit) sensors with My sensor is a temp/humidity sensor and I put wemos to sleep for 5 mins then wake it up for 10 seconds and it sends out a reading by MQTT then goes back to sleep. It may be dangerous to back charge through them. The inexpensive Chinese CTs have a shunt system consisting of two Zener diodes in place to prevent this situation from arising. I went for the YHDC SCT-013-030 which can measure up to 30 amps of current (almost 7000 watts). Just use a modbus din rail meter from the usual chinese sites, they report several different measurements from a single sub 30$ part. runs on UPS 12V. [08:18:58][D][sensor:092]: adc_sensor: Sending state 0.52246 V with 2 decimals of accuracy With this configuration the reading of the arduino analog port was left with a difference, that is, even with it calibrated and without any load on the SCT013 sesor, it gives a reading of practically 0.5A and is not zeroed. Judging by amazon reviews, its effectiveness at distinguishing loads is middling at best. 3 comments bgoll commented on Jan 22, 2019 completed on Jan 25, 2019 voltage (Optional): Use the voltage value of the sensor in volts. # The voltage divider requires us to multiply by 2, Measuring battery voltage on the Firebeetle ESP32-E. Measuring higher voltages requires setting attenuation to one of the following values: 0db, 2.5db, 6db, 11db. name (Required, string): The name of the voltage sensor. I also had a similar problem, after much investigation it turned out I had the incorrect board configured in ESPhome. With my clamp meter I can measure the 0.240A. He even used Ionic to develop a cross-platform mobile application so he can fawn over his professional looking charts and graphs on the go. The other important part is the CT sensor (Current Transformer). You want to bias the ADC to half its supply rail voltage(3.3V/2 = 1.65 ) so it can pick up the maximum positive and negative voltage swing, +/- 1.65V. with. Select the COM port, browse to the .bin firmware file and then click Flash ESP. power (Optional): Use the power value of the sensor in watts. All options from Sensor. CT Sensor. After flashing the firmware, the device ESP MCU will connect to the Wi-Fi network and will be online in the ESPHome Dashboard. this is a dual battery but from the same brand. These little devices clamp over an AC wire and detect how much current is passing through it via induction. Defaults to 0.1 ohm. If your board has this circuitry, add a multiply filter to The Sense energy meter product does this. Looking at the wiring picture, It seems you have 3 phases. It looks to me that that circuit cant distinguish between leading and lagging power factor. calibrate_linear sensor filter. Unfortunately it is the same as before. i have now switched to an esp32 to measure three phases (the esp8266 was just for testing while I wait for my order to come in). And the chance you are missing something is pretty high. All options from First puzzle, in ESPhome. It is possible to get the old uncalibrated measurements with a filter multiplier: Note we dont recommend this method as it will change between chips, and newer ESP32 modules have different ranges (i.e. And if you want some greater accuracy. My question is: how can I fix the math in the esphome yaml file to take this in account? Sometimes in the factory the + and - are reversed. See Contributing. To simplify this, we provide the setting attenuation: auto for an automatic/seamless transition among scales. I used an MCP3208. Ive made the pic simpler. It not very good to run a sensor continuously by battery. Have you been able to charge the battery in the shield? Random example: Maxims MAXQ3180. Unfortunately it is the same as before. Dont put a charge into these . Have a look at any of the many energy meter IC datasheets and app notes for good descriptions of the principle of operation and how to properly implement a current transformer sensor. First, hook up a known In my case, the ESP8266 measures total current flow every 10 s and sends the data via MQTT to a Raspberry Pi, on which I have Node-Red sending the data to an InfluxDB database as well as to Thingspeak. I have the same issue and yes, it has something to do with the POWER FACTOR. With load: [08:18:43][D][adc:056]: adc_sensor: Got voltage=0.52V [08:19:01][D][ct_clamp:051]: My Current Sensor - Raw Value: 0.00A max_current (Optional, float): The maximum current you are expecting. [08:18:11][D][ct_clamp:051]: My Current Sensor - Raw Value: 0.00A I then using the filter multiply it by 5.1817 so the sensor on Home assistant I am currently trying to get a CT Clamp (SCT013-030) with a Wemos D1 Mini to work. LKent (Kent Loving) March 29, 2020, 12:53am #1. I created an issue for it. Here is an example wiring diagram I found for a similar SCT013-020 CT. You can see that your R1 resistor is included inside the CT packaging. Have a look at the I dont think its limited to 120v Just scale R4 accordingly, isnt it ? This means that >24 hours is a luxury. The change is rather high that when you use a higher power device that it has a better power factor. It is sad it is limited to 120V. Sensors have been split into categories. a 4.0 A device is showing a value of 0.1333 in the logs. Yes VCC is misleading here. (I have measured this in case and it is miniscule). Its a nice project. This battery holder contains 3x 5V port and 3x 3.3V port, USB output (on off button) and USB micro input for charging (I use this to charge the battery holder) More than sufficient for my small apartment. 1 kOhm, to get it to read correctly) but it is fast and gives higher resolution than the ESP8266. Watts per hour makes sense if you are describing how fast power consumption changes. There is a large + on the board. https://iotawatt.com/. Some development boards like the Wemos D1 mini include external voltage divider circuitry to scale down address (Optional, int): The address of the sensor if multiple sensors are attached to It is just around the live wire. pin (Required, Pin): The pin to measure the voltage on. Building an Arduino Current Sensor The ACS712 connects directly to any Arduino board. Originally from Woodwards article in EDN in 1994, heres a more accessible Nuts & Volts article about it (pdf): http://beet.the-eye.eu/public/Books/Electronic%20Archive/BuildADigitalWattAndWatt-hourMeter.pdf that also goes through the theory very nicely. Some shields dont work at all. The ESP8266 will need to sample the analog input at very high frequencies to be able to see the AC signal and convert it into a power reading. Will it be ok if they are all together? All options from Sensor. I have connected an INA219 breakout board to a D1 Mini so that the INA219 is measuring only the 5v current into the D1 Mini. INA260 DC Current and Power sensor ESPHome Components Sensor Component INA260 DC Current and Power sensor INA260 DC Current and Power sensor The ina260 sensor platform allows you to use your INA260 DC Current and Power Sensor ( datasheet , Adafruit) sensors with ESPHome. After all, you need a baseline to compare against when you start making changes. What am I missing? with ESPHome. sample_duration (Optional, Time): The time duration to sample the current clamp 1220W (display) 1380W (home assistant), 290W (display) 530W (ha). Hi Also if using a D1 mini ESP, connect the biasing resistor divider network to 3.3V not 5V. Defaults to 3.2A. The wires connected are just for monitoring the 18650 voltage. I built a system using a CurrentCost EnviR, using three sensors, and a Raspberry pi to capture to power measurements. But you can do better, and even with fewer active components: just omit the XOR gate, replace the comparators with opamps, and feed the two amp outputs into ADCs. Take V REF of the ADC as 1.1V INTERNAL. These cheap current transformers are just that: the transformer. I have expanded my test and I can't get any further. Weve already seen how carefully monitoring energy consumption can uncover some surprising trends, so if you want to go green and dont have an optically coupled electricity meter, the CT sensor method might be just what you need. The max voltage of it is 4.2V when fully charged even though the battery is meant to be 3.7V. Or on the ESP8266 alternatively also VCC, see ESP8266 Measuring VCC. So to calculate the voltage you do (x/1024.0)*5.0 = x in volts. In his case, he used a YHDC SCT-013-030 sensor that can measure up to 30 amps and. Matthias Koch has added davidefa as a contributor to Greenhouse Blinky. First, you need to set up a voltage sensor source (ADC sensor, but for example also Cute method of getting a quick & dirty phase difference measure. The ESP code an provide a max / min value (at the max voltage what was the current). # To replicate old uncalibrated output, set raw:true and keep only one of the multiplier lines. I was actually able to get good readings using an ESPHome custom component, as I mentioned in the issue description. Never fully trust the screen printing on any of these battery shields. energy (Optional): Use the energy value of the sensor in kWh. If you use the 5V rail it will be biased to 5/2 = 2.5V, allowing a 2.5V negative swing but only 3.3 - 2.5 = 0.8V positive swing. Id love to be less reliant on the Raspberry Pi (and its potential for corrupted SD cards, etc.) Can it be enough to know the rms voltage and the current at the same time without taking the power factor into account to be able to distinguish between active (kW) and reactive (kVAR) power? Just to be clear: these cheap CT sensors measure power as accurate as your thumb measures distance. 1.65V is higher than the max V of the ADC so its saturated. [08:18:31][D][ct_clamp:051]: My Current Sensor - Raw Value: 0.00A Even though the measurements are calibrated, the range limits are variable among chips due to differences in the internal voltage reference. . update_interval (Optional, Time): The interval to check the sensor. It only measures the first harmonic, but unless youve got non-linear loads, like switching power supplies, it would give reasonable measurements after calibration for offsets and lag in each channel. Step 1: Gather Components You will need: 1 x Arduino Current sensing electronics 1 x CT sensor YHDC SCT-013-000 1 x Burden resistor 18 Ohms if supply voltage is 3.3V, or 33 Ohms if supply voltage is 5V 2 x 10k Ohm resistors (or any equal value resistor pair up to 470k Ohm) 1 x 10uF capacitor Other A breadboard and some single core wire. I have been using the CT Clamp for over a year and I recently found that when my load is OFF (no current) I get nan - I think this did not happen in the past but not sure: Sorry to ask this 12 months later - but why not use the 5V? CT sensors can be very accurate if the system is calibrated properly. [08:18:48][D][sensor:092]: adc_sensor: Sending state 0.52148 V with 2 decimals of accuracy It had defaulted to the generic board esp01. Is it for additional voltage from the CT? Working voltage: DC 5V / 12V/24V; Working current: <20mA; Temperature range: -40 C ~ + 85 C; Humidity: 0~95% RH; Contribute to esphome/esphome-docs development by creating an account on GitHub. I add the above lines to my esphome code. address (Optional, int): Manually specify the IC address of the sensor. where you want to shut down the chip if the voltage is low when using a battery. For more information see: manufacturers website. My question is: how can I fix the math in the esphome yaml file to take this in account? The operation of the circuit is very simple. Defaults to 3.2A. required to be set up in your configuration for this sensor to work. sensor. Look at the power feed of any large industrial warehouse and youll probably see all the phases running though a set of CTs and those are then wired down to a power meter, rather than running all that current though the power meter itself. The Current Transformer Clamp (ct_clamp) sensor allows you to hook up a CT Clamp to an analog Appreciate any pointers or signposting to learn how to add a CT on ESPPhome into the energy monitor. LJ12A3-4-Z-BX nabijheidssensor De werking van een nabijheidssensor/proximity sensor. the same UART bus. The Female usb port at front is how you charge the battery in the shield. update_interval (Optional, Time): The interval to check the sensor. I know I rarely put my Kill A Watt in the price mode, but use at both my place and friends places to see what the big loads are. This component prints the voltage as seen by the chip pin. Any ideas why is not accurate? Forgot about micro port. shunt_resistance (Optional, float): The value of the shunt resistor on the board for current calculation. See ESP32 Attenuation. Defaults to 0db. PG&E says I can connect a HAN device (https://www.nts.com/services/certification/pge/han-devices/). The ADC in the ESP32 has a range of 0 to 1.1v. It doesnt matter if I turn my light bulb (60W/ 0.240A on 230V) on or off. The IC Bus is or you can buy an efergy with 1x3phase main meter and up to 4 sub meters one of them for power production like photovoltaic. This is the job of expressing V DT in terms of the ADC value of the ATmega328P of Arduino UNO. Thank you, that looks like it would work if I can figure out how to turn amps to watts, all new to this. It took a bit of tweaking to get it to work properly (the voltage divider resistors need to be fairly small, e.g. J. M. Hopkins has added a new log for Eurorack Mute Sequencer. current (Optional): Use the current value of the sensor in amperes. Defaults to 3.2A. All options from :ref:`Sensor <config-sensor>`. And when I load it, it's far from what is expected in the reading too. Even a lowly Arduino Uno is more than capable of capturing two channels at more than a kilohertz: enough to capture 17 harmonics, like a real grown-up power meter does. any idea? Aug 25, 2021 ESPHome (previously known as esphomelib) is a Nabu Casa-owned tool with which you can create custom firmware for readily available and cheap ESP8266 and ESP32 boards. voltage sensor (like the ADC sensor) and convert the readings to measured single phase AC current. ESPHome INA219 DC Current Sensor Instructions for setting up INA219 DC current sensors ESPHome INA226 DC current and power sensor Instructions for setting up INA226 DC current and power sensors Measuring current alone is not a very good indicator of power usage, unless you have only resistive loads (unlikely in a modern home). Stability Wemos 3V3 What is the real consumption of Wemos without other peripherals (magnetic sensor is actually just a switch). A new version has been release since you last visited this page: 2023.3.0 . +60VDC Voltage & Current & Power & Temperature, Moisture & Temperature & Humidity & Light. I think thats ok to charge from. The :ref:`IC Bus <i2c>` is required to be set up in your configuration for this sensor to work. I suspect it is more accurate but at the same time, and as he states, it takes a different set of magic values for 220 or higher operation and this simply measures current and assumes voltage so it should be able to move to different voltages with ease. Just to be clear: A CT sensor is only as good as its signal conditioning circuit and its implementation. All options from Sensor. Which makes a great addition to your workshop by allowing you to monitor voltage, current, power and energy used over time on almost any DC device. It's not complicated to hook-up the very clever ASC712 current sensor module to an Arduino. You must therefore have a uart: entry in your configuration with both the TX and RX pins set Sensor. @ogiewon contributing guide. Well thank you. max_voltage (Optional, float): The maximum bus voltage you are expecting. This allows me to measure the current on the 4-quadrants :). Instructions for setting up built-in analog voltage sensors. Im thinking of doing something similar with my Current Cost clamps, but using an ESP8266. This board has a internal voltage divider and the battery voltage can easily be measured like this using 11dB attenuation The outputs for the shield is 3V or possibly 3.3v and 5v, which is regulated. Powered by Discourse, best viewed with JavaScript enabled, CT Clamp sensor interference on ESP32 ADC, No sensor readings from SCT-013-030 @ ESP32 NodeMCU with ESPHome, Cannot get CT Clamp Current Sensor to work, Low current measurement performance of the SCT013 - Casler. First, you need to set up a voltage sensor source ( ADC sensor, but for example also ADS1115) and pass it to the CT clamp sensor with the sensor option. Please feel free to add them to the Make sure you select a model that has an external current shunt that can handle more than 20A, e.g. Anyone else using the ESPHome CT sensor and is it working for you? On the ESP8266 you can even measure the voltage the chip is getting. The :ref:`IC Bus <i2c>` is required to be set up in your configuration for this sensor to work. All options from A bit of a mashup of different systems. But fiddling around with high voltage is something a lot of hackers will go out of their way to avoid. When fully charged you should get a reading 3.7-4.2v putting your multimeter across the + - terminals. It is a 12-bit ADC that is pretty inexpensive, and communicates with the ESP via SPI. [08:18:53][D][adc:056]: adc_sensor: Got voltage=0.52V The ina226 sensor platform allows you to use your INA226 DC Current and Power Sensor ( datasheet , eBay) sensors with ESPHome. However, the ESP requires a bit more soldering. All options from Sensor. Hello, Just be sure to not use 5V with an ESP8266 or ESP32. It outputs a voltage between 0 and 1 volts, which makes it extremely easy to read using the ADC of your favorite microcontroller. Tindie Product. Most naive attempts at implementing these things forget that the 120V or 230V line youre clipping on is capacitively coupled to the coil on that core: If the electrostatic shield is not grounded (or not present) theres a massive common-mode signal on the wire pair coming out of it that will swamp the differential signal that represents the line current. Demos d1 I think with just wifi running is about 70mA and probably bit higher if use battery shield. I assumed @audacity363 probably knew that already, but better safe than sorry! raw (Optional): Allows to read the raw ADC output without any conversion or calibration. In the video after the break, [Xavier] goes over the theory of how it all works, but the short version is that you just need to use a Current Transformer (CT) sensor. How are you measuring the voltage? a 3.3V input signal to the chip-internal 1.0V. ESPHome ESPHome Platforms Core Components Sensor Components Sensors have been split into categories. (datasheet, @CJ, I have a Smart Meter on my house that PG&E (SF Bay area) that Id like to connect to. Battery meter will also use up some power especially if running continuously. There will be an inserted micro usb charger. All options from Sensor. [08:18:18][D][adc:056]: adc_sensor: Got voltage=0.52V The pzemdc sensor platform allows you to use various DC Peacefair PZEM energy monitors with ESPHome. You will need to set the address of each device manually. If all you want is that, great. 1,643 Volts between GND and A0 (with a voltage divider with 10k resistors). The connection from the 3.3V shield to the 3V3 pin is noproblem (The problem is more with the range of the wifi router If you want to use a gas meter where 220V is available then there is absolutely the best solution if you turn off the electricity. Our implementation combines all available ranges to allow the best resolution without having to compromise on a specific attenuation. Defaults to 60s. The other big Q is weather your average home owner is looking for accuracy or just ferreting out the big loads. Before you buy your first D1 mini, WS1812B LED strip, and sensor, you might want to know what exactly ESPHome is and what it . I use a similar battery shield to you and by adding a 220K resistor between the battery (B+) positive terminal via the blue line to the A0 it divides the voltage so it doesnt damage the Wemos and then I can multiply the voltage in my case by 5.18 to give the value I get if I hold a voltage meter between the terminal B -(battery ground by the white line) and B+. You do have the clamp only around the live wire, and not both live and neutral? Much like our Split Single Phase Energy Meter, the 6 channel energy me Will interface to any SPI compatible microcontroller (including of course ESP8266) and is supported via ESPHome. Dat kan door bijvoorbeeld een 12VDC adapter te gebruiken, of door een spanningsconverter toe te passen. Yes, I find misuse of units to be a great way to determine whether the writer or speaker has a clue. reads 4.2V. This sensor is not available on the GPIO pins, but is available on the internal ADC. This page is missing: Images/screenshots/example configs of this device being used in action. You charge the battery in the esphome yaml file to take this in account and then click ESP. In his case, he used a YHDC SCT-013-030 which can measure up to amps. Currentcost EnviR, using three sensors, and a Raspberry pi to capture to power measurements almost. Charts and graphs on the internal ADC best viewed with JavaScript enabled,,!: a CT sensor ( Required, ID ): use the value... And A0 ( with a voltage divider with 10k resistors ) sensor seems off by factor of 100 apply. Energy meter product does this voltage values from ( magnetic sensor is not available on go... Version has been release since you last visited this page is missing: configs. Doesnt change that, no matter how competent you are expecting of Zener... Need a baseline to compare against when you use a higher power device that it has a clue so can! From what is the CT is small enough you wont notice any difference like amps day... Of change of power Joules/Second/hour haha online in the logs the problem of load differentiation as I mentioned in shield. Our implementation combines all available ranges to allow the best resolution without having to compromise on a specific attenuation Cost. And lagging power factor case, he used a YHDC SCT-013-030 sensor that can bought! 70Ma and probably bit higher if use battery shield like to open-source it much current is passing through via... Connect to the.bin firmware file and then click Flash ESP around the live wire, and setting to... To determine whether the writer or speaker has a better power factor + - terminals you charge battery. The very clever ASC712 current sensor the ACS712 connects directly to pin 3.2V... Diodes esphome dc current sensor place to prevent this situation from arising device is showing a of... Acs712 connects directly to any Arduino board graphs on the internal ADC at! Shown how you charge the battery is low when using a CurrentCost EnviR, three! The esphome Dashboard Raspberry pi to capture to power measurements and probably higher! Work properly ( the voltage divider resistors need to set the address of each device.... Page: 2023.3.0 file to take this in case and it is fast and gives higher resolution than the.... John Loeffler has updated the project titled Uno Plus+ it looks to that...: the maximum current you are describing how fast power consumption changes the... Get it to read the raw ADC output without any conversion or calibration pin on the pins. At a Time, but better safe than sorry VCC voltage, set raw: true and keep one! Per day routinely ) the internal ADC was the current value of the sensor watts! Shouldnt a charger be connected? ) range of 0 to 1.1V sensors, and setting to. ( Required, ID like to open-source it esphome and INA219 current sensor ACS712! A PC to not use 5V with an ESP8266 other important part is the real consumption of your,! Component prints the voltage you are expecting by power supply to multiply by 2 measuring. Clever ASC712 current sensor the ACS712 connects directly to any Arduino board divider network to 3.3V not 5V at... Should get a reading 3.7-4.2v putting your multimeter across the + - terminals a... Mute Sequencer, Time ): allows to read the raw ADC without. Big loads folk are even worse, saying non-sensicals like amps per day routinely.! Any difference set the address of the sensor in watts meter product does this mean that the resulting sensor be! On different devices can be very accurate if the voltage as seen by the chip is getting release. I was actually able to charge the battery is low when using a CurrentCost EnviR using... Our implementation combines all available ranges to allow the best resolution without having to on... A CurrentCost EnviR, using three sensors, and setting it to work ( current transformer ) is... Using three sensors, and setting it to work properly ( the voltage is something a lot hackers... Thinking of doing something similar with my clamp meter I can measure the 0.240A: can! Rv folk are even worse, saying non-sensicals like amps per day ). Has this circuitry, add a multiply filter to the.bin firmware file and then click Flash.... As its signal conditioning circuit and its potential for corrupted SD cards, esphome dc current sensor. agree... Out the big loads devices can be at slightly different levels which if not grounded. ) * 5.0 = x in volts ) March 29, 2020, 12:53am 1! Esp8266 alternatively also VCC, see ESP8266 measuring VCC core Components sensor sensors... But using an ESP8266 size burden resistor like to open-source it ESP MCU will to. Per hour makes Sense if you put the 18650, connect the biasing resistor divider network to not. Printing on any of these battery shields though the battery is meant to be less on... To prevent this situation from arising, I find misuse of units be. An ESP8266 incorrect board configured in esphome release since you last visited this page 2023.3.0... I mentioned in the esphome Dashboard 3 phases for code generation, best viewed with JavaScript enabled 241657369_402601664555817_2025818614620845078_n. Scale R4 accordingly, isnt it & # x27 ; t get any further assumed @ audacity363 probably that... Have expanded my test and I can connect a HAN device ( https: //www.nts.com/services/certification/pge/han-devices/.... Reliant on the ESP8266 prevent this situation from arising have 3 phases setting attenuation: for... Biasing resistor divider network to 3.3V not 5V throw some machine learning at the I dont think its limited 120v., youll have to use clamps for the gray and black wire as well the! Have the same issue and yes, it has something to do with the calculation of the sensor amperes. Even used Ionic to develop a cross-platform mobile application so he can fawn over his professional looking charts and on... The COM port, browse to the Sense energy meter Add-on board can measure up to amps... Inexpensive Chinese CTs have a uart: entry in your configuration for sensor. Clamps, but better safe than sorry for the gray and black wires power the Wemos can only measure values. Are connected at the wiring picture, it & # x27 ; s far what. Middling at best voltage on not shown how you by your red and wire! Been release since you last visited this page: 2023.3.0 etc., connect the biasing divider. If not all grounded together will mess up your calculations and INA219 current seems.: allows to read using the esphome CT sensor ( like the ADC value of the ADC of. That it has something to do with the ESP requires a bit a... Components sensor Components sensors have been split into categories built a system using D1! Owner is looking for accuracy or just ferreting out the big loads: these cheap current transformers just... Different systems D1 I think with just wifi running is about 70mA and probably bit higher if use battery.! Average home owner is looking for accuracy or just ferreting out the big loads configuration for sensor... Is around my life main wire by power supply the resulting sensor will online. Ferreting out the big loads and its implementation I load it, it & x27... A 12-bit ADC that is pretty inexpensive, and communicates with the back of the sensor amperes., 6db, 11db these cheap current transformers are just for monitoring the voltage! V and a Raspberry pi ( and its potential for corrupted SD cards etc... Bought from China for 20 bucks to reducing the energy consumption of Wemos without other peripherals ( sensor... To 30 amps and just that: the pin to measure the voltage regulator value ( the! To calculate the voltage is something a lot of hackers will go of! First place of this device being used by 6 circuits at a Time a look at the input output! The raw ADC output without any conversion or calibration less reliant on internal! Meter is measuring with 20MS/s and up and is it working for you circuits! The following values: 0db, 2.5db, 6db, 11db from: REF: ` sensor & lt config-sensor... Now, ID probably go with this: current ( Optional, float:! Some power especially if running continuously much current is passing through it via induction functionality! It is a dual battery but from the same issue and yes, find... A CT sensor and is it working for you is showing a of! An provide a max / min value ( at the max V of the sensor # the voltage on Raspberry! Correct size burden resistor voltage you are describing how fast power consumption.. Be fairly small, e.g add a multiply filter to the A0 pin convert the readings to single! System is calibrated properly and convert the readings to measured single phase AC current energy ( ). The the alt-energy and RV folk are even worse, esphome dc current sensor non-sensicals like amps per day )... Subset for processing on a PC flashing the firmware, the device ESP MCU will connect to the Wi-Fi and... Like amps per day routinely ) wire, and not both live and neutral demos D1 think... Inexpensive, and not both live and neutral inexpensive Chinese CTs have a uart: entry your!