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arendst / Tasmota

Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at
https://tasmota.github.io/docs
GNU General Public License v3.0
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S31 #2939

Closed tcpipchip closed 6 years ago

tcpipchip commented 6 years ago

Does the S31 has in pcb extras pins to add more sensors inside ? (i2c and Spi sensors and INFRARED for example) ?

znanev commented 6 years ago

Even if it has, this device has measuring live voltage and current capabilities, which means that you don't have real ground and you can possibly fry anything you attach to it and/or electrocute yourself.

So my advice is - DO NOT connect any low-voltage stuff to S31's PCB if it is plugged into mains.

tcpipchip commented 6 years ago

Ok, thank you! Good should be use other module to do this! right ?

znanev commented 6 years ago

Exactly, you can use S20 (or its newest variant - S26). In S20 at least you can disable serial logging and reconfigure the Tx/Rx pins for I2C.

Just for the purpose of attaching additional sensors/electronics, stay clear of the devices with built-in energy measuring (like Sonoff POW or S31). Because their low-voltage electronics is not properly isolated from mains and can lead to nasty, if not deadly, surprises if abused!

digiblur commented 6 years ago

The S20 version is great (US here), lots of room, easy to solder a header to and get to the pins. Have to agree with the S31, super tight in there and would be difficult to put wires out to a sensor. The S31 is great for what it does and its size but just don't add any sensors to it with the mains so close.

ascillato commented 6 years ago

Hi @znanev , If your issue was solved, please close it. Thanks :+1:

znanev commented 6 years ago

Hi @ascillato, I have only replied to @tcpipchip on this issue, so I cannot close it.

@tcpipchip - can you please close this issue if it has been resolved? Thanks!