Shelly 1 +Temperature Shield

[sieth]

Has anyone managed to get ESPEasy to read the Temperature from the shield?

I just can't seem to get it working with ESPEasy. With the original Shelly firmware it works.

I added the picture of the official shield.

Thanks in advance!!!

Sieth

[ThomasB]

I'm not a Shelly user, but from reviewing the device pin-out it appears the DS18B20 would be configured to use GPIO-0.

If that GPIO pin does not work for you then I suggest you post a clear photo of your wiring and a screenshot that shows your Environment-DS18b20 plugin settings. The images will help the Shelly users see what might need to change in your setup.

- Thomas

[sieth]

Thomas,

I've included all the printscreens and photo's of my setup.
I Used GPIO-0 but no reading.

Greetings,
Sieth

[ThomasB]

The setup seen in the screenshot looks reasonable. Are you sure the shield and DS18B20 sensor are still good? I suggest re-testing them on the original Shelly firmware to confirm operation.

I didn't find any useful info on using the Shelly 1 shield. So maybe you are wandering in uncharted territory. Hopefully someone that has walked in your shoes will drop by and lend a hand.

BTW, don't operate without the plastic covers. They protect you from the un-isolated side of AC mains.

- Thomas

[sieth]

Indeed it works with the original Shelly firmware. So I know it's a firmware thing.

I think i'll have you wait until someone finds out how it can be fixed.

Thank you so far!

[grovkillen]

And you have tried all the GPIOs? Sounds simple enough since it's only one pin you have to get right.

[ThomasB]

I think i'll have you wait until someone finds out how it can be fixed.

I found some experimental code for the Shelly 1 shield on a Tasmota github:
https://github.com/arendst/Tasmota/comm ... e14a38eeb6

Unfortunately it shows that the DS18B20 temperature sensor will require two I/O pins: Output=GPIO-0, Input=GPIO-3. This isn't supported by ESPEasy's DS18B20 plugin.

It seems that the two GPIO pins are due to the isolation circuitry in the Shelly Shield. The shield uses a ISO7221A Dual Digital Isolator IC that supports two unidirectional signals. So the expected bi-directional access to the "One-Wire" DS18B20 has been split into separate input and output paths.

Long story short, ESPEasy currently will not support this particular Shelly application.

- Thomas

[Kalm6]

Shelly 1 requested ESP_Easy_mega-20200204_normal_ESP8266_1M.bin. Disconnected the port and used RX (gpio3), TX (gpio1) to connect the temperature sensor.

[TD-er]

The Shelly1 also has 2M flash, so if possible I would go for that build as it will make upgrading the firmware a lot easier.