Category Archives: OpenSky

Posts/Pages related to my opensource implementation of the 2-way FrSky protocol

tinyFISH FC — report of the first successful community built fc

The first community built tinyFISH fc is alive! I recently got an email from the rcgroups user Sevo. He  successfully managed to assemble and flash his tinyFISH fc. Congratulations, this is the first report of a working replica from the community! Even though he had no access to a microscope he managed to complete his… Read More »

tinyFISH FC – initial setup & flashing tutorial II/II

In the previous tutorial we flashed the betaflight firmware into the STM32 of our flightcontroller, this time we will flash the tinyFISH FC receiver firmware. We are going to use the frsky compatible OpenSky firmware. You can now decide to download the latest version of OpenSky here and build the tinyfish target yourself (make TARGET=TINYFISH).… Read More »

FrSky D4R-ii – components, layout, and pinout

While i was porting my OpenSky firmware to the D4R-ii receiver i made this collection of used parts and created a pin mapping. Maybe this is useful to someone in the future. Components used CPU: STM32F103C8 [Datasheet] EEPROM: 24C02 [Datasheet] RF Chip: CC2500 [Datasheet] HF-SWITCH: RDAES02 [Datasheet] PA/LNA: RDAT212 [Datasheet] RF Path The overall path… Read More »

OpenSky on D4R-ii – pinout, flashing, and usage

In this post i am going to explain how to use my opensource firmware on a FrSky D4R-ii receiver. Please refer to the main page about my opensource project OpenSky for general information. Addition information on the board layout, used components, and the pinout can be found in this blog post. Pinout The default configuration… Read More »

OpenSky on VD5M – pinout, flashing, and usage

In this post i am going to explain how to use my opensource firmware on a FrSky VD5M receiver. Please refer to the main page about my opensource project OpenSky for general information. Pinout The default configuration of my code uses the following pinout. If the board is in front of you with the leds… Read More »