E32-433T20DT ( SX1278, 3.0km, UART, 410~441MHz, 10~20dBm, 0.3k~19.2kbps, SMA-K ) Wireless Module


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Detail about E32-433T20DT Wireless Module

E32-433T20DT is a wireless transceiver module based on SX1278 from SEMTECH(can be transmitter and receiver both). It adopts LoRa spread spectrum technology, with this technology the transmitting distance and penetration ability of the module improved more than 1 times compared with traditional FSK.


  • IC : SX1278
  • Frequency : 410~441MHz
  • Power : 10~20dBm
  • Distance : 3.0km
  • Interface : UART

RF Parameter Value
Working frequency
410~441 MHz

Default: 433MHz

Transmitting power 10~20 dBm

Default: 20dBm(About 100mW

Receiving sensitivity -146 dBm

Air data rate: 0.3kbps

Air data rate 0.3k~19.2kbps

Default: 2.4kbps

Test distance 3000 meter

In open and clear air, with maximum power, 5dBi antenna gain, height of 2m,

air data rate: 2.4kbps

Hardware Parameter Value
21 * 36 mm

Without SMA

Antenna type SMA-K


Communication interface UART

Baud rate: 1200~115200, default: 9600

Package  DIP


Buffer 512 bytes buffer

Automatically sub-packaging with 58 bytes per package

Electronic parameter

Min. Typ. Max. Unit Condition
Power supply
2.3 3.3 5.5 V
Communication level 3.0 3.3 3.6 V
Transmitting current 102
110 118 mA 20dBm(100mW)
90 93 96 mA 10dBm(50mW)
Receiving current 12
15 18 mA
Sleep current 3
5 8 μA
Operating temperature -40 20
Operating humidity 10 60
90 %
Storage temperature -40 20

E32 (433T20DC)

Pin No.
Pin Item Pin Direction Pin Application
1 M0
(weak pull-up)
    Work with M1 & decide the four operating modes. Floating is not allowed, can be ground.
2 M1 Input
(weak pull-up)
    Work with M0 & decide the four operating modes. Floating is not allowed, can be ground.
3 RXD Input     TTL UART inputs, connects to external TXD (MCU, PC) output pin.
    Can be configured as open-drain or pull-up input
4 TXD Output

    TTL UART outputs, connects to external RXD (MCU, PC) input pin.
    Can be configured as open-drain or push-pull output

5 AUX Output

    To wake up the external MCU, during the procedure of self-check initialization, the pin

    outputs low level. Can be configured as open-drain output or push-pull output (floating

    is allowed).

6 VCC Input     Power supply 2.3V-5.2V DC
7 GND Input     Ground
8 Fixing hole     Fixing hole
9 Fixing hole     Fixing hole
10 Fixing hole     Fixing hole



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