E32-400T20S-V2.0 Wireless serial port module LoRa spread spectrum SX1278 chip low power consumption long-distance wireless transparent transmission

ZZteco

Main parameters	performance		Remark
Main parameters	minimum value	maximum value	Remark
Power supply voltage(V)	0	5.2	Exceeding 5.2V may permanently burn the module
Blocking power (dBm)	-	-10	Do not communicate at close range with high-power radio frequency
Working temperature (℃)	-40	85	Industrial grade

Main parameters		performance			Remark
Main parameters		minimum value	Typical value	maximum value	Remark
Working voltage v		3.3	5	5.2	≥3.3V can guarantee the output power. The lower the voltage, the greater the supply current.
Communication level(V)		-	3.3	-	Using 5V TTL risks burning out
Working temperature (℃)		-40	-	85	Industrial grade design
Working frequency band (MHz)		410	-	525	Support ISM band
achievement	Emission current (mA)	-	106	-	Instantaneous power consumption
consume	Receive current(mA)	-	15	-	-
	Sleep current (uA)	-	4	-	Software shutdown
Maximum transmit power (dBm)		19	19.5	20	-
Receiving sensitivity (dBm)		-144	-146	-147	Over-the-air rate 2.4 kbps
Air rate (bps)		0.3k	2.4k	19.2k	User Programmed Control

Main parameters	describe	Remark
reference distance	5000m	In a clear and open environment, the antenna gain is 5dBi, the antenna height is 2.5 meters, and the air rate is 2.4kbps.
Subcontracting method	197 Bty	The maximum capacity of a single package, which will be automatically subdivided if exceeded.
cache capacity	512 Bty	-
Modulation method	LoRa™	-
Communication interface	UART serial port	TTL level
Packaging method	SMD type	-
Interface mode	1.27mm	-
Overall dimensions	16 * 26mm	-
Antenna interface	IPEX/stamp hole	Characteristic impedance is about 50 ohms

ZZteco

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