M5Stamp RS485 Module

The M5Stamp RS485 Module from M5Stack is an RS485 communication expansion board that converts the 3.3V TTL level of the MCU serial port into a differential signal compatible with the RS485 standard.

With a compact size of just 20mm x 4.6mm x 23mm, it can be integrated into various embedded devices for RS485 communication interface expansion. Suitable for RS485 sensor data acquisition, Modbus bus node communication and other applications.

Features

• SP485EEN-L/TR(RS485 transceiver)
• 2x RS485 interface expansion (parallel), can be connected to two devices at one time
• Red LED indicator
• The PWR485 interface supports 9-24V DC input, internal DCDC step-down to 5V to power the module and main control.
• Baud rate:
  • Stable communication baud rate: 9600bps/115200bps
  • Maximum communication baud rate test: 128000bps
• Multiple soldering options:
  • Three types of soldering options are available (SMT, DIP, Jumper wire),
  • With high-temperature resistant plastic enclosure, Peak temperature = 230℃

Package Contents

• 1x STAMP PWR485
• 1x HT3.96 4-pin female connector
• 2x HY2.0 4-pin female connector (blue + white)
• 1x HEX Key 1.5mm

Specifications

RS485 Transceiver	SP485EEN-L/TR
Input Voltage	PWR485 interface Supports 9-24V input power TTL side input voltage 5V
Recommended baud rate	9600bps/115200bps
Operating Current	[email protected]
	[email protected]
	[email protected]
Input Logic Level	3.3V
Net Weight	5.1g
Gross Weight	7.3g
Product Size	20*4.6*23mm
Package Size	93*138mm

Resources

• Product Wiki
• Schematic
• Dimensions
• Arduino Example:
  • UART TEST
• Libraries:
  • ArduinoModbus Lib
  • Arduino485 Lib