RD400D_Other_SPI-SOC-UART

Ebyte RD400D Digital radio module 410-470MHz TRIMATLK/TRIMMARK3/TRANSEOT

[Communication interface]：UART

[Transmission power]：30dBm

[Communication distance]： 5.6km

[Modulation method]： GMSK/4FSK

[Introduction]：RD400D is a table mounted built-in fixed-frequency transceiver-transmitter data transmission module (radio), working in the 410MHz~470MHz frequency band, focusing on surveying and mapping, precision agriculture, drones and the Internet of Things The application environment has the characteristics of light weight, small size, low power consumption and superior reception performance. It supports a variety of power gear selection, free switching of air baud rate, rich serial port baud rate selection, and easy operation.
Support for TRIMATLK, TRIMMARK3, TRANSEOT (OR PCC OR TRANSPARENT PROTOCOL).

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Pin serial number	Pin name	Inputoutput	Pin usage
1	GND	Inputoutput	Power ground
2	RSSI	output	Analog voltage output, indicating received signal strength, voltage output range: 0.5V-2.5V = The higher the voltage, the stronger the signal reception.
3-6	NC	input	Dangling (for internal testing use)
7-9	NC	NC
10-13	IO	Input output	obligate
14-16	NC	NC
17	GND	Input output	Power ground
18-19	NC	NC
20-24	IO	obligate	obligate
25-26	GND	Inputoutput	Power ground
27	NC	NC
28	RXD	input	Serial port receiving interface
29	TXD	output	Serial port send interface
30-36	NC	NC
37-38	NC	input	obligate
39-41	GND	Inputoutput	Power ground
42-44	NC	NC
45	RST	input	Module reset pin： active low
46	CONFIG	input	Module parameter configuration mode control pin, low level into parameter configuration mode, High level exits parameter configuration mode
47-61	NC	NC
62-64	VCC	input	Power input pin (3.3-3.6V)： the use of the need to 62, 63： 64 pin all connected.
65-67	GND	Inputoutput	Power ground
68-77	NC	NC
78-80	GND	Inputoutput	Power ground