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HM1X telemetry module

Connectors

4-pin Hirschmann CA3GD sensor connector

pin number function notes
1 VCC out (5V) max. 100mA for powering sensor
2 RS485 - A alt: UART TX
3 RS485 - B alt: UART RX
4 / GND GND

7-pin Hirschmann CA6GS power connector for solar panel

pin number function notes
1 BATT+ 3.3-3.6V (e.g. LiFePO4 including charging voltage)
2 IO1 charging status of battery (high - charging, low - not charging) (high, low against BATT+ pin)
3 IO2 voltage on solar panel scaled to 0-3.6V max.
4
5
6
7 GND (BATT-)