EBYTE E77-400M22S Wireless Module LoRa Spread Spectrum 433/470MHz 868/915MHz ARM Cortex-M4 Low Power Consumption SoC

E77-400M22S LoRaWan node module UART interface AT command configuration Support LoRaWAN 1.0.3 EU433/CN470   [Chip solution]： STM32WLE5CCU6 [Carrier frequency]：410~510 MHz [Transmit power]： 22dBm [Communication distance]： 5600m [Product size]： 14*20mm [Product weight]：1.6g±0.1g [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. 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 ℃ -