[Open Source] STM32 four-axis remote control

**1. Introduction:** **Four-axis remote control designed based on Xiao Ma Ge's RoboFly open source four-axis software platform, open source four-axis: [Open Source Quadcopter](https://oshwhub.com/PQG2030PQG/kai- yuan-si-zhou-fei-xing-qi)** **2. Remote control functions:** **1. Main control STM32F103C8T6** **2. SI24R01 wireless communication four-axis remote control, OLED four-axis attitude response transmission display, voltage return display, one-key unlock function, etc. ** **3. Button function** **Power light D1: It is the power indicator light, and the remote control is powered on. ** **Signal light D2: Flashing - the four-axis and remote control are connected but not unlocked, steady on - the aircraft is unlocked. ** **Left joystick: The joystick moves up and down to control the ascent and descent of the four axes, and the joystick left and right controls the heading angle of the four axes. ** **Right joystick: The joystick moves up and down to control the forward and backward movements of the four axes, and the joystick left and right controls the left and right movement of the four axes. ** **Buttons: K1 is the unlock/lock button - the K1 button is only effective when the throttle is pulled the lowest, K2 is reserved, K3 is the sensor calibration button, and K4 is the mode selection. ** **3. Finished product display** ![Four-axis complete set.jpg] **4. Accessories and other matters** **1. After the program is burned into the remote control, it needs to be calibrated, otherwise the four-axis will not fly , check the source code of the remote control for details** **2. The power supply is a 3.7V 1S lithium battery, which can also be powered by USB. The SWD program download interface is reserved** **3. Electronic amateurs cannot guarantee the standardization of PCB layout design. , the design needs to be improved** **4. No problems have been found during use. If you have any questions, you can leave a message in the comment area below** **5. For problems other than PCB engineering, please watch Xiao Ma’s open source four-axis learning video: [ Xiao Ma’s DragonFly four-axis STM32 microcontroller course](https://www.bilibili.com/video/BV1Qs41137dk/?spm_id_from=333.788.videocard.0)**