Any possibility for ACS712 (or analog) support?

[martin072]

I noticed a very small and cheap current sensor, ACS712 that would possibly fit in the Sonoff modules.
I believe it works with an Analoge Out.. Is there any option to add support for analog A0 inputs?

[ionciubotaru]

Analog support is already implemented in Tasomota
comment the following line in user_config.h

#define USE_ADC_VCC // Display Vcc in Power status. Disable for use as Analog input on selected devices

[martin072]

Ok, but which command would readout the A0 pin? I Only see a reference in the code to a 'Witty cloud' device.. Mine is a regular Sonoff, and I would just like to use the A0 pin..

[ionciubotaru]

read this and configure your module
https://github.com/arendst/Sonoff-Tasmota/wiki/Adding-new-Module-types

[martin072]

Thanks ionciubotaru, still struggling a bit how to work this out.. I can see the ADC0 is disabled in mytmplt, so I can set it to GPIO_USER and I will assume it will popup in the webserver to configure. But from there it ends.. Since none of the sensors in the list are related to ADC read out..
(Just noticed the release notes from 4.0.4 onwards say: Delete module User Test as module Wemos D1 mini has same/more user configurable GPIO (#178))

[ionciubotaru]

select wemod d1 mini it has ADC gipo selectable - you will find the adc values in tele messages

{ "WeMos D1 mini", // WeMos and NodeMCU hardware (ESP8266)
GPIO_USER, // GPIO00 D3 Wemos Button Shield
GPIO_USER, // GPIO01 TX Serial RXD
GPIO_USER, // GPIO02 D4 Wemos DHT Shield
GPIO_USER, // GPIO03 RX Serial TXD and Optional sensor
GPIO_USER, // GPIO04 D2 Wemos I2C SDA
GPIO_USER, // GPIO05 D1 Wemos I2C SCL / Wemos Relay Shield (0 = Off, 1 = On) / Wemos WS2812B RGB led Shield
0, 0, 0, 0, 0, 0, // Flash connection
GPIO_USER, // GPIO12 D6
GPIO_USER, // GPIO13 D7
GPIO_USER, // GPIO14 D5
GPIO_USER, // GPIO15 D8
GPIO_USER, // GPIO16 D0 Wemos Wake
GPIO_ADC0 // ADC0 A0 Analog input
},

[martin072]

Great, got it now, thanks!

[effelle]

Sorry to open again this thread, but is still a little confusing how to enable GPIO_ADC0 on generic module (old wemos one).
On sonoff_template.h I have:

{ "Generic", // Any ESP8266/ESP8285 device like WeMos and NodeMCU hardware (ESP8266)
GPIO_USER, // GPIO00 D3 Wemos Button Shield
GPIO_USER, // GPIO01 TX Serial RXD
GPIO_USER, // GPIO02 D4 Wemos DHT Shield
GPIO_USER, // GPIO03 RX Serial TXD and Optional sensor
GPIO_USER, // GPIO04 D2 Wemos I2C SDA
GPIO_USER, // GPIO05 D1 Wemos I2C SCL / Wemos Relay Shield (0 = Off, 1 = On) / Wemos WS2812B RGB led Shield
0, 0, 0, // Flash connection
GPIO_USER, // Flash connection or GPIO09 on ESP8285 only!
GPIO_USER, // Flash connection or GPIO10 on ESP8285 only!
0, // Flash connection
GPIO_USER, // GPIO12 D6
GPIO_USER, // GPIO13 D7
GPIO_USER, // GPIO14 D5
GPIO_USER, // GPIO15 D8
GPIO_USER, // GPIO16 D0 Wemos Wake
GPIO_ADC0 // ADC0 A0 Analog

I have an ACS712 too and I'm trying to configure it on one of my Amica ESP-12E that has the A0 gpio, and I can't have it configured at all, since ADC0 pin doesn't show up on settings webpage.
I've tried with or without define USE_ADC_VCC (user_config.h) but with no luck. I wonder if I can use another type of module other than the generic one to accomplish what I need or if is simply an incompatible sensor.
Thanks.

[ascillato]

You need to compile tasmota with #define USE_ADC_VCC commented out (file user_config.h)

[effelle]

Is already commented out, with the ´#´ in front. But I compiled in both way. The A0 doesn't show up.

[ascillato]

Sorry no
The # is a compiler directive

You need to add // before the #

[effelle]

The the correct way is // #define USE_ADC_VCC?
Ok. Compiling right now.

[effelle]

// -- Internal Analog input -----------------------
// #define USE_ADC_VCC                              // Display Vcc in Power status. Disable for use as Analog input on selected devices

Still not working. Or at least is not here where I can find A0.

[arendst]

As there is nothing to configure on a ADC channel you won't see it in the configuration webpage.

Just connect your analog signal and verify it's values on the main webpage.

[effelle]

@arendst : never mind. After testing my acs712 under another sketch I realize is dead.
Time to buy a pzem, I think is much more efficient e reliable.

[effelle]

@arendst
Sorry to bother you again but even with another sensor (this time an LDR) I can't see any analog value on main webpage nor on tele.
On another sketch I tested if it's working:

void setup() {
  Serial.begin(9600);
}

void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float voltage = sensorValue * (5.0 / 1023.0);
  
  // print out the value you read:
  Serial.println(voltage);
}

And all is fine, I got reading from 0.1 to 3.2.
On Tasmota (6.2.0) I've commented the line on user_config.h as suggested:

// -- Internal Analog input -----------------------
//#define USE_ADC_VCC                              // Display Vcc in Power status. Disable for use as Analog input on selected devices

and I've upload the sketch to my unit, configured as generic module since I'm using an AMICA NodeMCU V3 (ESP-12E), which has analog A0 enabled.
On my main webpage I can see just my DS18B20, but nothing about the analog.

Here's my status 0 command:

01:55:22 CMD: status 0
01:55:22 MQT: stat/sonoff2/STATUS = {"Status":{"Module":18,"FriendlyName":["Sonoff","Sonoff2"],"Topic":"sonoff2","ButtonTopic":"0","Power":0,"PowerOnState":3,"LedState":1,"SaveData":1,"SaveState":1,"ButtonRetain":0,"PowerRetain":0}}
01:55:22 MQT: stat/sonoff2/STATUS1 = {"StatusPRM":{"Baudrate":115200,"GroupTopic":"sonoffs","OtaUrl":"http://sonoff.maddox.co.uk/tasmota/sonoff.bin","RestartReason":"Power on","Uptime":"0T00:11:24","StartupUTC":"2018-09-14T00:43:58","Sleep":0,"BootCount":106,"SaveCount":545,"SaveAddress":"F7000"}}
01:55:22 MQT: stat/sonoff2/STATUS2 = {"StatusFWR":{"Version":"6.2.0","BuildDateTime":"2018-09-12T21:29:14","Boot":31,"Core":"2_4_2","SDK":"2.2.1(cfd48f3)"}}
01:55:22 MQT: stat/sonoff2/STATUS3 = {"StatusLOG":{"SerialLog":2,"WebLog":2,"SysLog":3,"LogHost":"","LogPort":514,"SSId":["EffE-Domus","EffE-WiFi-Sala"],"TelePeriod":300,"SetOption":["00008009","55818000","00000000"]}}
01:55:22 MQT: stat/sonoff2/STATUS4 = {"StatusMEM":{"ProgramSize":513,"Free":488,"Heap":15,"ProgramFlashSize":1024,"FlashSize":4096,"FlashMode":3,"Features":["00000809","0FDEE794","00000004","37FFBFCE","00000000"]}}
01:55:22 MQT: stat/sonoff2/STATUS5 = {"StatusNET":{"Hostname":"sonoff2-4272","IPAddress":"192.168.15.104","Gateway":"192.168.15.1","Subnetmask":"255.255.255.0","DNSServer":"192.168.15.100","Mac":"80:7D:3A:23:50:B0","Webserver":2,"WifiConfig":5}}
01:55:22 MQT: stat/sonoff2/STATUS6 = {"StatusMQT":{"MqttHost":"192.168.15.102","MqttPort":1883,"MqttClientMask":"DVES_%06X","MqttClient":"DVES_2350B0","MqttUser":"admin","MqttType":1,"MAX_PACKET_SIZE":1000,"KEEPALIVE":15}}
01:55:22 MQT: stat/sonoff2/STATUS7 = {"StatusTIM":{"UTC":"Fri Sep 14 00:55:22 2018","Local":"Fri Sep 14 01:55:22 2018","StartDST":"Sun Mar 25 02:00:00 2018","EndDST":"Sun Oct 28 03:00:00 2018","Timezone":1,"Sunrise":"06:25","Sunset":"19:06"}}
01:55:22 MQT: stat/sonoff2/STATUS10 = {"StatusSNS":{"Time":"2018-09-14T01:55:22","Switch1":"ON","Switch2":"ON","DS18B20":{"Temperature":23.1},"TempUnit":"C"}}
01:55:22 MQT: stat/sonoff2/STATUS11 = {"StatusSTS":{"Time":"2018-09-14T01:55:22","Uptime":"0T00:11:24","Vcc":3.166,"POWER1":"OFF","POWER2":"OFF","Wifi":{"AP":1,"SSId":"EffE-Domus","RSSI":54,"APMac":"A4:33:D7:3C:11:DC"}}}

On status 11 I can see a Vcc value, but it change slightly even in dark (minimum was 2.770) then I think is relative to the instant load of the board not the analog. But I may be wrong, obviously.
On status 8 I can see just my digital sensor:

02:04:08 CMD: status  8
02:04:08 MQT: stat/sonoff2/STATUS8 = {"StatusSNS":{"Time":"2018-09-14T02:04:08","Switch1":"ON","Switch2":"ON","DS18B20":{"Temperature":23.1},"TempUnit":"C"}}

I do apologize if I'm hammering this thread in that way, but I'm just trying to understand how this works (newbe here), and I didn't find much hints on wiki.
Since there is the possibility to use an analog device (or more?) I think someone with a good english should write a couple of line about, but not me, was already hard write down a post here in a foreign language...

[martinezmp3]

did you ever got this working im in the same spot now

[knopserl]

I have also the same use case where I wanted to sens the current with a ACS712. I have configured the device to use analog read and also to use analog values as CT (power monitor).
I use a ACS712/20A which igives 100mV per 1A. Since I use 230V AC and the ESP8266 modules have a 0-1V range, I have set it up with the trip-pot to 500mV (from the 2,5V output with no current).
So if there is a load on 230V AC, the analog input pulses aroun 500mV up and down. E.g. at 1A = 230Watt it has 400 to 600mV.
But tasmota shows nonenes values between 300 to 900Watt, when there is no load (should be 0).
I have set up the analog voltage with the trim-pot to 0mV, then it shows 0 A and 0Watt but that is wrong. 500mV = 512 digital value (from 1024 as max if 1V is reached = 20A).
I have attached a screen-shot.
Any ideas? I have a test program which works with the ESP8266 + ACS712. I will verify if the HW is working (I have tested it with anaother ESP8266 and it shows proper values at half voltage on A0 which is 0 Amp).

[meingraham]

@knopserl

A Tasmota PR was recently merged for using a current sensing device (e.g., a current transformer) on ADCO. The pin on the ESP82xx expects 1V however many devices provide a contact on the device for A0 which has a voltage divider built-in and expects voltages in the range on 0v-3.3v.

As this is a very old (ancient) issue, please refrain from posting as its not likely to get a lot of attention. In any case, Tasmota GitHub issues are intended for bugs and feature requests. Your question, at least at this time, likely falls into the category of configuration or setup question.
Please address any further questions to the Tasmota Support Discord Chat. The chat is a better and more dynamic channel for helping you. Github issues are best used for Tasmota software feature requests and bug reporting. Troubleshooting and setup assistance is more effective using an interactive forum.

Please check the Contributing Guideline and Policy and the Support Guide.

Thanks.

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[knopserl]

@meingraham thanks for your fast response. I'll follow your recommendation.
Though, I thought it's either a feature request or bug and less a configuartion issue. At least I have not found any more configuration options than I have chose (analog feature switched on and CT option for power meter). And in the analog reading source I found a comment which points to 230V AC and a 20A/1V setting, which I found it fit't well to my setup.

[mochoandre]

meingraham

FY!!!!