spi 410mhz---525mhz 3000m transmitting distance sx1278 lora module for long range irrigation systems
the rf-42sh module is lora spread spectrum module, which based on the semtech sx1278. it is wireless spi transceiver module with 3.3v ttl level output. and it’s working frequency band is 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. lora meets battery power requirements and is suitable for applications with ultra-low power consumption.
| pin no | name | type | description |
| 1 | gnd | p | ground |
| 2 | gnd | p | ground |
| 3 | dio5 | i/o | configurable universal io port |
| 4 | dio4 | i/o | configurable universal io port |
| 5 | dio3 | i/o | configurable universal io port |
| 6 | dio2 | i/o | configurable universal io port |
| 7 | dio1 | i/o | configurable universal io port |
| 8 | dio0 | i/o | configurable universal io port |
| 9 | res | i | reset pin |
| 10 | vcc | p | power supply, range from 3.3v to 5.3v (5v is recommended, as external ceramic filter capacitor) |
| 11 | sck | i | spi clock input pin |
| 12 | miso | o | spi data output pin |
| 13 | mosi | i | spi data output pin |
| 14 | nss | i | module chip select pin for starting spi communication |
| 15 | txen | i | rf switch pin control; txen is high when transmitting, rxen is low. |
| 16 | rxen | i | rf switch pin control; rxen is high when receiving, txen is low. |
| 17 | gnd | p | ground |
| 18 | rf | o | antenna port |
