Victor
There are 3 types of LCD driver ICs used in different editions of LYWSD03MMC. Documentation for the used models of LCD driver chips is not in the public domain. For...
> Thanks for your feedback. On other issue https://datasheet4u.com/datasheet-parts/BU9792FUV-datasheet.php?id=705112 lcd datasheet is show. This lcd driver is not used on all the LYWSD03MMC edition ? This controller is used only...
The maximum interval according to the specification is 10 seconds. On all modern smartphones with Android, this works fine. On linux -[ trouble and a lot of torment](https://github.com/pvvx/ATC_MiThermometer/issues/172#issuecomment-1008288148), on Windows...
The source code is given - collect your version :)
For compatibility with third party software, the [atc1441 battery percentage formula](https://github.com/atc1441/ATC_MiThermometer/blob/master/ATC_Thermometer/battery.c#L79) is used. For example, [HA custom_components ble_monitor](https://github.com/custom-components/ble_monitor/blob/master/custom_components/ble_monitor/ble_parser/atc.py#L56), this is how voltage is calculated: ``` volt = 2.2 + (3.1...
 In this graph, most devices have an operating time of about 1 year. Several devices operate in sub-zero temperatures and show low battery percentage. The smallest value on the...
Readings of LYWSD03MMC installed outdoors with a new battery (from December 10, 2021). And that is how it works to this day. 
system_adc_read() system_get_vdd33() + https://github.com/pvvx/esp8266web/blob/master/app/driver/adc.c#L52
This applies to the original firmware - built-in offset of + 5% The stability of the sensor readings also depends on the supply voltage, temperature, and vapor composition. More than...
Added...