User's Manual

MReX Transceiver User Manual v1.92 Firmware
Module Pin descriptions
Inputs/Outputs
Pin Number
Description
1 GND
2 GND
3 Input/Output – Digital 5
4 Input/Output – Digital 4
5 Input/Output – Digital 3
6 Input/Output – Digital 2
7 Input/Output – Digital 1
8 Output – Digital 1 (open drain)
9 TX Serial TTL (out 3.3V)
10 RX Serial TTL (in 3.3V)
11 GND
12 Power IN + (5-9Vdc, 150mA)
13 GND
14 GND
15 LED 2. (open drain). Red Transmit.
16 LED 1. (open drain). Green Status.
17 GND
18 Power IN + Battery (3V)
19 GND
20 GND
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