3ua 3000 meters transmission distance sx1278 433mhz lora module for sensor network
rf-star rf-42up module is a lora spread spectrum module based on the semtech sx1278 chip. wireless serial port transmission module (uart), 3.3v ttl level output. working frequency band 410mhz---525mhz. compared with traditional radio frequency technology, lora spread spectrum technology has the characteristics of concentrated power density, strong anti-interference ability, strong confidentiality and longer transmission distance. it meets battery power requirements and suitable for applications with ultra-low power consumption.
| pin no | name | type | description |
| 1 | gnd | p | ground |
| 2 | s0 | i | cooperate with s1 to determine the module’s working mode.(no hanging, if no ground is used.) |
| 3 | s1 | i | cooperate with s0 to determine the module’s working mode.(no hanging, if no ground is used.) |
| 4 | rxd | i | uart rx signal |
| 5 | txd | o | uart tx signal |
| 6 | en | o | the serial port is pulled high before sending data and pulled low when completed.wake up the pin periodically, pull up when waking up.when the module sends data, it is pulled high and pulled low when completed. |
| 7 | vcc | p | power supply, range from 3.3v to 5.2v. |
| 8 | gnd | p | ground |
| 9 | res_mcu | i | reset pin, hanging. |
| 10 | gnd | p | ground, hanging. |
| 11 | 3v3_mcu | i/o | power supply pin when the program loading, hanging. |
| 12 | swim_mcu | i/o | swim pin when the program loading, hanging. |
| 13 | pb0 | i/o | hanging |
| 14 | pb1 | i/o | hanging |
| 15 | pb3 | i/o | hanging |
| 16 | gnd | p | ground |
| 17 | gnd | p | ground |
| 18 | ant | i/o | antenna port |
| 19 | gnd | p | ground |
