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letscontrolit / ESPEasy

Easy MultiSensor device based on ESP8266/ESP32
http://www.espeasy.com
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Add support TMP107 Temperature Sensor with Daisy-Chain UART, EEPROM, and Alert Function #4670

Open 3dalex07 opened 1 year ago

3dalex07 commented 1 year ago

Please add support for TMP107 Temperature Sensor with Daisy-Chain UART, EEPROM, and Alert Function I find library for arduino may be it help impelement support of this sensor https://github.com/jgromes/SmaartWire

Thanks

TD-er commented 1 year ago

What makes these sensors specifically more useful compared to the 1-Wire or I2C sensors? What's against them (IMHO) is that they need another serial port, which is a rather limited resource.

It seems though that these devices can be daisy chained, similar to the 1-Wire sensors, but that means a plugin for these needs a shared managing (software) instance to coordinate shared resources. So they seem to have come up with yet another standard to probably only allow for their own devices to use this bus. I don't really see why they simply can't use any of the already existing busses out there.

Edit: OK, apparently these can also be used on CAN/RS485 busses. Then it makes sense what they did here.

3dalex07 commented 1 year ago

The robust UART-compatible SMAART wire interface transfers data over a single wire at distances of up to 1000 feet (300 meters) between consecutive devices in the chain, and is capable of communicating in a daisy-chained configuration with up to 32 devices on a single bus

TD-er commented 1 year ago

Still it feels a bit like re-inventing the wheel as there are already several busses and bus protocols out there. For example ModbusRTU, when sent over RS485, is doing something really similar and when loweing the bitrate far enough, can even do upto 1200m.

But I will look into it.

One question popping up in my head about this is whether it needs different configurations/code when used via different interfaces like RS485 or CAN bus as those act differently when addressing devices as far as I thought.

3dalex07 commented 1 year ago

How can i help to implement support of this sensor?

tonhuisman commented 1 year ago

Sure, here's some documentation to get started https://espeasy.readthedocs.io/en/latest/Participate/PlatformIO.html Be warned, it can be a bit daunting at first, but just ask for help where & when needed 👍