E22-400TBH-02 LoRa module development test board

• Specification
• Parameters
• Pin Definition

Serial number	parameter name	Parameter value	Remarks
1	Support module	E22-400T37S/E22-230T37S/E32-433T37S	LoRa wireless module
2	Test board size	59.5*97mm	-
3	Production Process	Lead-free process, machine-mounted	Wireless products must be machine-mounted to ensure batch consistency and reliability.
4	Power supply interface	-	-
5	Communication Interface	USB	uart to USB
6	Operating temperature	-40~+85℃	Industrial grade
7	Working humidity	10%~90%	Relative humidity, no condensation
8	Storage temperature	-40~+125℃	Industrial grade

Pin number	Pin name	Type	Pin usage
1	GND	input	Module ground wire
2	GND	input	Module ground wire
3	RESET	input	Module reset pin
4	AUX	output	Used to indicate the working status of the module; the user wakes up the external MCU and outputs low level during power-on self-test initialization; (can be left floating)
5	TXD	output	TTL serial port output, connected to the external RXD input pin;
6	RXD	input	TTL serial port input, connected to the external TXD output pin;
7	M1	input	Cooperate with M0 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used)
8	GND	input	Module ground wire
9	GND	input	Module ground wire
10	M0	input	Cooperate with M1 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used)
11	3.3V	-	No need to care, leave it hanging
12	GND	input	Module ground wire
13	SWCLK	-	No need to care, leave it hanging
14	SWDIO	-	No need to care, leave it hanging
15	NC	-	No need to care, leave it hanging
16	NC	-	No need to care, leave it hanging
17	NC	-	No need to care, leave it hanging
18	485-EN	input /Output	The enable control pin of the external 485 chip can be left unconnected if it is not used.
19	STATE	output	Module status indication output, if no floating processing is used
20	GND	input	Module ground wire