This code produces a real-time [432-434] or [914-916] MHz spectrum "waterfall" display: The waterfall2 is an enhancement of the waterfall1 project and uses two sx1276-based modules attached to a HyTiny (stm32f1).
Colours are mapped from black (min) => blue => yellow => red => white (max).
The display scrolls smoothly and continuously from right to left.
The frequency step is approx 10kHz, resulting in a width of 240*10=2.4Mhz across the display.
Each sweep takes approx 12ms and 4 sweeps are performed per pixel scan line.
Components used for this project:
- HyTiny - https://www.hotmcu.com/x-p-222.html
- 2.8" LCD - https://www.hotmcu.com/x-p-121.html
- RFM96 915Mhz - http:https://www.hoperf.com/rf\_transceiver/modules/RFM69CW.html
- RFM98 433Mhz - http:https://www.hoperf.com/rf\_transceiver/modules/RFM69CW.html
LCD connections, using the pins on the HyTiny's FPC-12 connector and flat cable:
- MOSI = PB5
- MISO = PB4
- SCLK = PB3
- NSEL = PB0
- DC = PB6
- RST = PB7
- LED = PA15
RFM96 915Mhz connections, using the standard SPI1 pins:
- MOSI = PA7
- MISO = PA6
- SCLK = PA5
- NSEL = PA4
- DIO0 = PA3
- RST = PA11
RFM98 433Mhz connections, using the standard SPI1 pins:
- MOSI = PA7
- MISO = PA6
- SCLK = PA5
- NSEL = PA8
- DIO0 = PA12
- RST = PA11
Other pins can be assigned by adjusting the source code.
This project is set up for PlatformIO as toolchain:
- open this project in a supported IDE or do
cd examples/waterfall/ - adjust
platformio.inias needed, in particular the upload port - then build and upload, e.g.
pio run -t uploadfrom the command line
Found a bug? Please post on GitHub.