In this topic I discussed some radio frequency devices:
I am now going to use two HC-12 modules with various updated codes.
HC-12 works with radio frequencies but is not Bluetooth.
With these modules it is possible to send information to more than 1600 meters (1 mile).
- 433 MHz
- Maximum transmit power: 20 dBm (100 mW), receive sensitivity: -129 dBm.
- 100 channels spaced 400 kHz.
- Range, about 1000 m, outdoor.
- Its parameters can be changed using AT commands:
4 modes of operation:
FU3 (default, 1200bps ~ 1000 m, 115200bps ~ 100 m)
FU4 (only small packets can be sent: max 60 bytes with the interval of 2 seconds. In this mode, range is increased to 1800m.)
You can find many tutorials on this module on the internet:
In this test they achieve a range of more than a mile: https://www.youtube.com/watch?v=awOPJK5He28
In these examples we will use the FU3 mode and default settings.