E32-400T20S-V2_SX1278_LoRa_Module

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E32-400T20S-V2 Wireless serial port module LoRa spread spectrum SX1278 chip low power consumption long-distance wireless transparent transmission

[IC]：SX1278

[Frequency]：410~525MHz

[Power]：20dBm

[Distance]：5km

[Interface]：UART

[Weight]：5.5g

[Introduction]：E32-400T20S-V2 is a wireless serial port module developed for the wireless meter reading industry. The factory default is 470MHz meter reading frequency band, long packet mode (197 bytes per packet) and the module supports LoRa™ spread spectrum technology. The LoRa spread spectrum solution has the characteristics of air wake-up function (low power consumption), long communication distance, anti-interference ability and strong confidentiality. It uses industrial-grade crystal oscillators to ensure its stability and consistency, and the accuracy is less than 10ppm commonly used in the industry.

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Pin number	Pin name	Pin direction	Pin usage
1	NC	-	Empty feet
2	GND	-	Module ground wire
3	NC	-	Empty feet
4	NC	-	Empty feet
5	NC	-	Empty feet
6	NC	-	Empty feet
7	NC	-	Empty feet
8	GND	-	Module ground wire
11	GND	-	Module ground wire
12	ON	-	antenna
13	GND	-	Module ground wire
14	GND	-	Module ground wire
15	GND	-	Module ground wire
16	GND	-	Module ground wire
19	GND	-	Module ground wire
20	M0	Input (very weak pull-up)	Cooperate with M1 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used)
21	M1	Input (very weak pull-up)	Cooperate with M0 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used)
22	RXD	Input	TTL serial port input, connected to the external TXD output pin;
23	TXD	output	TTL serial port output, connected to the external RXD input pin;
24	TO	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)
25	VCC	-	Module power supply positive reference, voltage range: 2.6~5.2V DC
26	GND	-	Module ground wire

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