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atc1441 / ATC_MiThermometer

Custom firmware for the Xiaomi Thermometer LYWSD03MMC and Telink Flasher via USB to Serial converter
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BLE GATT UUID for Temperature? #150

Open plambrechtsen opened 3 years ago

plambrechtsen commented 3 years ago

Hi

I was using a BLE scanning app to monitor the custom firmware and it didn't detect the temp correctly. It seems the UUID assigned is 2A1F but I think it should either be 2A1C and specify if it is C or F, or 2A6E for C. https://github.com/atc1441/ATC_MiThermometer/blob/772348a2266ea22bd58795314be148a8154e6462/ATC_Thermometer/app_att.c#L67

As per: https://btprodspecificationrefs.blob.core.windows.net/assigned-values/16-bit%20UUID%20Numbers%20Document.pdf Found via the assigned numbers: https://www.bluetooth.com/specifications/assigned-numbers/

2A1C, with additional values to determine if C or F. https://github.com/oesmith/gatt-xml/blob/master/org.bluetooth.characteristic.temperature_measurement.xml

2A6E, for just sending C. https://github.com/oesmith/gatt-xml/blob/master/org.bluetooth.characteristic.temperature.xml

pvvx commented 3 years ago

2A1F - sint16 temperature in 0.1 °C 2A6E - sint16 temperature in 0.01 °C 2A1C - float

nRFConnect: image image https://github.com/pvvx/ATC_MiThermometer

plambrechtsen commented 3 years ago

2A1F - sint16 temperature in 0.1 °C 2A6E - sint16 temperature in 0.01 °C 2A1C - float

nRFConnect: image image https://github.com/pvvx/ATC_MiThermometer

Nice one @pvvx 👍