[Introduction]：E77-400M22S is a standard LoRaWan node module designed and produced by Ebyte, with an operating frequency band of 410~510MHZ, supports LoRaWAN 1.0.3 EU433/CN470 standards, supports CLASS-A/CLASS-C node types, and supports two network access methods: ABP/OTAA. At the same time, the LoRa module has a variety of low-power modes, and the external communication interface uses a standard UART. Users can access the standard LoRaWAN network through simple configuration of AT commands, which is an excellent choice for current IoT applications.
Official Store| RF Parameter | Value | Remark |
| Working frequency | 410~510 MHz | Support ISM band |
| Transmitting power | 0~21.5 dBm | The software is adjustable, and users need to develop their own settings |
| Receiving sensitivity | -118 dBm | GFSK，air speed1.2kbps |
| Reference distance(PCB/IPX) | 5600m | Clear and open environment, maximum power, antenna gain 3.5dBi, height 2m, airspeed 1.2kbps |
| Hardware Parameter | Value | Remark |
IC full name | STM32WLE5CCU6 | —— |
core | Cortex-M4 | —— |
FLASH | 256 KB | —— |
RAM | 64 KB | —— |
Crystal frequency | 32MHz/32.768KHz | External crystal |
Size | 14 * 20 mm | —— |
Antenna type | IPEX/stamp hole | Equivalent Impedance Approx.50Ω |
Communication interface | UART、SPI、I²C、GPIO、ADC | Users need to develop their own settings |
Packaging | Patch stamp hole | —— |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
| voltage | 1.8 | 3.3 | 3.6 | V | ≥3.3V Guaranteed output power Exceeding 3.6V will permanently burn the module |
communication level | - | 3.3 | - | V | Using 5.0V TTL is recommended to add level conversion |
Emission current | - | 128 | - | mA | Instantaneous power consumption |
| receive current | - | 14 | - | mA | —— |
| sleep current | - | 3 | - | μA | software shutdown |
Operating temperatur | -40 | 20 | 85 | ℃ | - |
Working humidity | 10 | 60 | 90 | % | - |
Storage temperature | -40 | 20 | 125 | ℃ | - |