Ebyte E04-400M20S Wireless Module 433MHz STM32WL33 RF Transceiver SoC Low Power Consumption 3.5KM 20dBm Small Size SMD Module

E04-400M20S SoC chip type wireless module based on STMicroelectronics STM32WL33 chip industrial grade crystal oscillators Support secondary development [RF chip]：STM32WL33 [Transmitting power]： 20dBm [Communication distance]： 3500m [Product size]：20*14mm [Introduction]：E04-400M20S is a SoC wireless communication module based on STMicroelectronics' newly launched STM32WL33 chip solution. The wireless module has the characteristics of long communication distance, low standby power consumption, strong anti-interference ability, rich interface resources, strong processing ability, and small size. It is also suitable for 433/470 frequency band patch wireless modules, using industrial-grade high-precision 32.768KHz and 48MHz crystal oscillators to ensure stable operation of the module. This wireless module requires secondary development by the user and can be widely used in the Internet of Things industry. Send Inquiry Purchase File DownloadsCompare Specification Parameters Pin Definition Order Way File Downloads Series Products RF parameters Parameter value Remark Working frequency band 413~478  MHz Support ISM frequency band Transmit power 0~20  dBm The software is adjustable and requires users to develop settings by themselves. Receive sensitivity -132  dBm @1% OFF Communication distance 3500 meters Sunny and open environment, maximum power, antenna gain 3.5dBi, height 2m, airspeed 1.2kbps Hardware parameters Parameter value Remark IC full name STM32WL33KCV6 - Kernel ARM Cortex-M0+ - FLASH 256 KB - RAM 32 KB - Crystal frequency 48MHz/32.768KHz External crystal oscillator Size 14 * 20 mm - Antenna form IPEX/stamp hole Equivalent impedance is about 50Ω Communication interface UART、SPI、I²C、GPIO、ADC Users need to develop their own settings Packaging method patch stamp hole - weight 1.2g ±0.1g Electrical parameters minimum value Typical value maximum value unit Remark Supply voltage 2.8 3.3 3.6 V ≥3.3V guarantees output power, exceeding 3.6V may damage the module Communication level - 3.3 - V When using 5.0V TTL, it is recommended to add level conversion Emission current - 150 - mA Instantaneous power consumption receive current - 18 - mA - Sleep current - 2.5 - μA - working temperature -40 20 85 ℃ - Working humidity 10 60 90 % - storage temperature -40 20 125 ℃