low power consumption 3000 meters sx1278 uart 410mhz---525mhz lora module
rf-star rf-42uhup 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.
| pinno | 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 sending data, then pulled high when completed.wake up the pin periodically, pull up when waking up. |
| 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 | io | vcc(power supply pin when burning the program) |
| 12 | swim_mcu | io | swim pin of internal mcu |
| 13 | pb0 | io | hanging |
| 14 | pb1 | io | hanging |
| 15 | pb3 | io | hanging |
| 16 | gnd | p | ground |
| 17 | gnd | p | ground |
| 18 | ant | io | antenna port |
| 19 | gnd | p | ground |
