The DM164139 from Microchip is a 915MHz RN2903 LoRa technology mote. The RN2903 LoRa mote is a LoRaWAN class A end device based on the RN2903 LoRa modem. As a standalone battery powered node, the mote provides a convenient platform to quickly demonstrate the long range capabilities of the modem as well as to verify interoperability when connecting to LoRaWAN v1.0 compliant gateways and infrastructure. The mote includes light and temperature sensors to generate data which are transmitted either on a fixed schedule or initiated by a button press. An LCD display provides feedback on connection status, sensor values and downlink data or acknowledgements. A standard USB interface is provided for connection to a host computer, providing a bridge to the UART interface of the RN2903 modem. As with all Microchip RN family of products, this enables rapid setup and control of the on-board LoRaWAN protocol stack using the high level ASCII command set.
- 868/915MHz high frequency SMA connector, 433MHz low frequency antenna point
- Green LED controlled by RN module GPIO10, orange LED controlled by RN module GPIO11
- Module breakout header 1, module breakout header 2
- Mote ICSP programming through holes, RN module ICSP programming through holes
- Backlight LCD display (1.2inch, 128 x 32 dot matrix)
- Everlight (ALS-PT19-315C) ambient light sensor, MCP1825S LDO regulator
- PIC18LF45K50 8bit USB XLP flash 32KB MCU and MCP9700 linear active thermistor
- Battery power switch, mote power indicator red LED
- Red LED controlled by MCU pin RA7, green LED controlled by MCU pin RA6
- USB micro-B connector, LCD ribbon connector and LCD backlight power connector
嵌入式设计与开发
