Files
defconxt fe5d115f3b 📦 Project structure: PlatformIO configs, proper file extensions, wiring docs
- Rename .txt firmware files to proper extensions (.cpp, .ino, .py)
  so GitHub provides syntax highlighting and IDEs detect them correctly
- Add PlatformIO project configs (platformio.ini) for both Rocket and
  Launcher firmware with all library dependencies pinned, enabling
  one-command builds: `pio run -e rocket -t upload`
- Add requirements.txt for the Python telemetry dashboard
- Add .gitignore for PlatformIO, Arduino IDE, Python, and editor artifacts
- Add docs/WIRING.md with complete pin assignments, I2C addresses,
  servo calibration values, and UDP protocol reference
  (reverse-engineered from firmware source)
- Rename Simulation/fdsdf.png to OpenRocket_3D_View.png

No functional changes to any firmware or software code.
2026-03-16 14:02:05 -06:00

3.5 KiB

Wiring Reference

Pin assignments reverse-engineered from the firmware source code.


Rocket Flight Computer (ESP32 DevKit V1)

Servo Connections

Function GPIO Pin Servo Position
Left Canard 26 Left side
Right Canard 25 Right side
Up Canard 27 Top
Down Canard 14 Bottom
Ignition Servo 13 Motor bay

Servo Center Calibration (from firmware defaults)

Servo Center Angle Max Deflection
Left 115° ±15°
Right 80° ±15°
Up 80° ±15°
Down 115° ±15°

I2C Bus (MPU6050)

Signal GPIO Pin
SDA 21
SCL 22

UART to Launcher

Signal GPIO Pin Baud Rate
TX2 17 115200
RX2 16 115200

Launcher Ground Station (ESP32 DevKit V1)

I2C Bus (shared by MPU6050, QMC5883L, BMP180)

Signal GPIO Pin
SDA 21
SCL 22

I2C Device Addresses

Device Address
MPU6050 0x68
QMC5883L 0x0D
BMP180 0x77

GPS Module (Serial1)

Signal GPIO Pin Baud Rate
RX1 34 9600

Note: GPS TX connects to ESP32 RX1 (pin 34). Pin 34 is input-only on ESP32.

UART to Rocket (Serial2)

Signal GPIO Pin Baud Rate
TX2 17 115200
RX2 16 115200

Control Switches & Indicators

Function GPIO Pin Type Notes
Arm Switch 15 Toggle Switch HIGH = armed
Launch Button 4 Momentary (N.O.) INPUT_PULLUP, active LOW
Status LED 2 LED (5mm) Onboard or external
Buzzer 5 Active Buzzer LOW-trigger
Ignition Servo 13 SG90 Micro Servo Launcher-side ignition

WiFi Configuration

Parameter Value
Mode SoftAP (Access Point)
SSID ROCKET_LAUNCHER
Password launchpad1
IP Address 192.168.4.1
UDP Port 4444

Dashboard (Python)

Connects to the launcher's WiFi AP and communicates via UDP.

Parameter Value
Listen IP 0.0.0.0
Listen Port 4444
Launcher IP 192.168.4.1

Telemetry Protocol (UDP ASCII)

Direction Format Example
Rocket → PC T,<ms>,<roll>,<rate>,<output> T,1234,5.2,-3.1,4
Rocket → PC STATUS:<state>,<Kp>,<Kd>,<skew> STATUS:FLIGHT,0.5,0.2,1.3
Launcher → PC ENV,<lat>,<lon>,<alt>,<gps_state> ENV,34.1467,-118.3885,200.5,2
PC → Rocket PID,<Kp>,<Kd> PID,0.8,0.3
PC → Rocket launch launch
PC → Rocket calibrate calibrate