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Home >Module>SPI/SOC/UART>SX12**
E28-2G4T20SX-1
E28-2G4T20SX-2
E28-2G4T20SX-3
E28-2G4T20SX-1
E28-2G4T20SX-2
E28-2G4T20SX-3
E28-2G4T20SX 2.4G Wireless Serial Port Module SX1281 LoRa spread spectrum anti-interference

[Chip solution]：SX1281

[Operating frequency]： 2.4~2.5GHz

[Transmit power]：20dBm

[Communication distance]：6km

[Product size]： 16*26mm

[Introduction]：The E28-2G4T20SX is a UART wireless serial port module from Ebitech based on the SEMTECH SX1281 RF chip. It supports transparent transmission, operates in the 2.4GHz band, and features LoRa, FLRC, and GFSK modulation/demodulation technologies, with TTL level output. This LoRa wireless module includes data encryption and compression functions. Since data transmitted over the air is random, robust encryption and decryption algorithms enhance data transmission security. Data compression reduces transmission time and the probability of interference, improving reliability and transmission efficiency.

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PIN
Pin number Pin Name Pin direction Pin Applications
1 NRST input Module reset pin, low level reset
2 GND Reference Module ground wire
3 M2 Input (very weak pull-up) The combination of M2, M1, and M0 determines the module's 8 operating modes (must not be left floating; if not in use, it can be grounded).
4 NC - Empty foot (not yet available; users do not need to worry about it).
5 NC - Empty foot (not yet available; users do not need to worry about it).
6 NC - Empty foot (not yet available; users do not need to worry about it).
7 NC - Empty foot (not yet available; users do not need to worry about it).
8 GND Reference Module ground wire
11 GND Reference Module ground wire
12 ON - Antenna interface (50Ω characteristic impedance)
13 GND Reference Module ground wire
14 GND Reference Module ground wire
15 GND Reference Module ground wire
16 GND - Module ground wire
19 GND - Module ground wire
20 M0 Input (very weak pull-up) The combination of M2, M1, and M0 determines the module's 8 operating modes (must not be left floating; if not in use, it can be grounded).
21 M1 Input (very weak pull-up) The combination of M2, M1, and M0 determines the module's 8 operating modes (must not be left floating; if not in use, it can be grounded).
22 RXD input TTL serial port input, connected to the external TXD output pin; configurable as open-drain or pull-up input, see parameter settings for details.
23 TXD Output TTL serial port output, connected to the external RXD input pin; configurable as open-drain or push-pull output, see parameter settings for details.
24 TO Output Used to indicate the module's operating status; outputs a low level during the power-on self-test initialization period when the user wakes up the external MCU; (can be left floating).
25 VCC - Module power supply positive reference, voltage range: 2.4～5.5V DC
26 GND - Module ground wire