SDR1125-dat.md

tech

• kicad-dat

• SDR1125-dat - CRSF-dat - ELRS-dat

• PCB-design-dat

• radiomaster-pocket-dat

orange boxes series

• OPM1153-dat - MP1584-dat == orange middle module

• CONN-USB-A-dat USB output 5V

• orange right-bottom == power input - dcdc-down-dat

red box

• DRV8871-dat == 2x motor driver - motor-driver-dat - motor-dat
  • motor1 IO15 IO18
  • motor2 IO7 IO8

yellow boxes

• 5V IO40 GND
• 5V IO2 IO1 GND
• 5V GND IO41 IO42
• support - location-dat input

main controller

• ESP32-S3-dat - NWI1243-dat

green box

• extra lead-out pins

  • RST, IO4, IO3, 3V3, GND
  • 5V, IO39, IO38, IO37, IO0, IO45, IO47, IO21, GND, VIN

• BAT monitor == IO36 - ADC-dat

blue box

• 2x mosfet == IO 5 6 - mosfet-dat

• 2x relay == IO 9 10 - relay-dat

• 4x servos == IO11 12 13 14 - motor-servo-dat

purple box

• ELRS-dat - IO 16 17

SDK

• motor-driver-design-dat - motor-driver-dat - motor-driver-rc-dat - ESC-dat

• ELRS-dat

control RC-dat setup

#define PIN_RX 17 #define PIN_TX 16

// Motor Driver DRV8871 Pins // Motor 1 (Left): IO15, IO18 #define M1_IN1 15 #define M1_IN2 18

// Motor 2 (Right): IO7, IO8 #define M2_IN1 7 #define M2_IN2 8

// Channels #define CH_THROTTLE 1 // Forward/Backward (CH1) #define CH_STEERING 3 // Left/Right (CH3) #define CH_SPEED_MODE 6 // Speed Mode (Low/Mid/High) (CH6)

// Reserved Servo IOs (not in use) #define SERVO1_PIN 11 #define SERVO2_PIN 12 #define SERVO3_PIN 13 #define SERVO4_PIN 14

// Reserved Buzzer control pin (not in use) #define BUZZER_PIN 46

// Reserved Relay IOs (not in use) #define RELAY1_PIN 9 #define RELAY2_PIN 10

// Reserved MOSFET IOs (not in use) #define MOSFET1_PIN 5 #define MOSFET2_PIN 6

// Battery Monitor #define BATTERY_ADC_PIN 36

// WS2812 Indicator #define RGB_PIN 48 #define NUMPIXELS 1 Adafruit_NeoPixel pixels(NUMPIXELS, RGB_PIN, NEO_GRB + NEO_KHZ800);

test

• DRV8871-dat output 12V or -12V to motor

ref