APPCON APC340

The APC340 is a highly integrated, low-power half-duplex wireless data transmission module featuring an embedded high-speed, low-power MCU and the high-performance spread-spectrum RF chip SX1276/8. It employs efficient cyclic interleaved error correction and detection coding, achieving industry-leading anti-interference performance and sensitivity. The APC340 offers multiple channel options with on-the-fly configuration of serial baud rate, transceiver frequency, transmit power, RF data rate, and other parameters.

The APC340 operates at 2.1–3.6V (customizable to 3.5–5.5V) and draws only 13mA in receive mode. It supports four operating modes with seamless switching between them. In the 1-second polling wake-up power-saving mode (Polling mode), receive current drops to just tens of μA, allowing a single 3.6V/3.6Ah lithium thionyl chloride battery to power the device for years — ideal for battery-powered systems.

As a next-generation multi-channel embedded wireless data transmission module, the APC340 supports multiple configurable channels with a 1KHz step size, a maximum transmit power of 100mW, and compact dimensions of 32.1mm × 18.3mm × 6.0mm for easy system integration. Its low power consumption makes it particularly well-suited for battery-powered applications.

The APC340 uses spread-spectrum modulation combined with high-efficiency error correction coding, delivering a coding gain approximately 10dBm higher than conventional modulation schemes such as FSK, GFSK, and PSK — placing its anti-interference capability and sensitivity at an advanced level. The coding also incorporates reliable error detection to automatically filter out erroneous and spurious data, enabling truly transparent connectivity. At equivalent transmit power, the APC340 achieves nearly twice the range of conventional modules, making it ideal for extremely harsh environments and applications with stringent range requirements.

The APC340 features a dual 256-byte buffer. When the buffer is empty, up to 256 bytes can be transmitted in a single transfer. When the over-the-air baud rate is set higher than the serial baud rate, data of unlimited length can be transmitted in a single transfer. The module provides a standard UART/TTL interface with seven baud rate options and three parity modes. Its external interface operates in transparent data transmission mode, compatible with both standard and non-standard user protocols — what is received is exactly what was sent.

• 3000m transmission range (0.81Kbps)
• Operating frequency: 433MHz, 470MHz, 868MHz, 915MHz selectable
• -132dBm sensitivity @ 810bps
• Max 100mW transmit power
• LoRa spread spectrum modulation
• Zero-delay wake-up with over-the-air activation
• Efficient cyclic interleaved error-correcting code
• Four operating modes, standby current 2.5uA
• Built-in watchdog for long-term reliable operation

• Wireless automatic meter reading
• Ultra-long range data communication
• Wireless sensor network industrial automation data acquisition
• Remote field data control and telemetry
• Various transmitters, flowmeters and smart instruments
• Building automation and security
• Mining and petroleum equipment monitoring and control
• Environmental, energy-saving and temperature monitoring
• Intelligent transportation and smart power grid