ELRS-TX-setup-motor-dual-dat

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MIXES setup

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Issue Analysis: Burned Board Diagnosis == mosfet driver board

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setup guide

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Dual Motor Differential Steering (Tank Mix) Setup

This configuration maps your Throttle stick (Left Stick Vertical) to control forward/backward speed, and your Aileron stick (Right Stick Horizontal) to control left/right differential steering.

Because we are combining two distinct inputs (Speed + Steering), each channel will contain TWO lines of code on your RadioMaster Pocket's MIXES page.

🛠️ Transmitter Mixer Layout (CH1 to CH4)

1. MOTOR A (Left Motor) ── Physical Outputs 1 & 2

The left motor spins faster when you steer right, and slower when you steer left.

CH1 (Left Motor Forward):
- Line 1: Source = Thr, Weight = 200%, Offset = -100%, Curve = Func x>0, Trim = OFF
- Line 2: Source = Ail, Weight = 50%, Multiplex = Add, Trim = OFF
CH2 (Left Motor Backward):
- Line 1: Source = Thr, Weight = -200%, Offset = -100%, Curve = Func x<0, Trim = OFF
- Line 2: Source = Ail, Weight = -50%, Multiplex = Add, Trim = OFF

2. MOTOR B (Right Motor) ── Physical Outputs 3 & 4

The right motor spins slower when you steer right, and faster when you steer left.

CH3 (Right Motor Forward):
- Line 1: Source = Thr, Weight = 200%, Offset = -100%, Curve = Func x>0, Trim = OFF
- Line 2: Source = Ail, Weight = -50%, Multiplex = Add, Trim = OFF
CH4 (Right Motor Backward):
- Line 1: Source = Thr, Weight = -200%, Offset = -100%, Curve = Func x<0, Trim = OFF
- Line 2: Source = Ail, Weight = 50%, Multiplex = Add, Trim = OFF

💡 How to Add the Second Line on EdgeTX

Go to the MIXES page on your RadioMaster Pocket.
Highlight the target channel (e.g., CH1), press and hold the system roller, then select Insert After.
A secondary line will appear nested directly underneath that channel.
Edit this new line to set your steering parameters (Source = Ail, etc.). Ensure the Multiplex option at the bottom remains set to Add.

🔍 Multimeter Verification Protocol (Before Connecting Driver Board)

Disconnect your IN1/IN2 motor driver board and measure the bare receiver signal pins against GND:

Sticks Completely Centered: Outputs 1, 2, 3, and 4 must all read 0V (Dead Stop).
Push Throttle Straight UP: Output 1 (Left Fwd) and Output 3 (Right Fwd) must smoothly climb to 3.3V. Outputs 2 and 4 must stay at 0V.
Throttle Straight UP + Move Steering RIGHT: Output 1 stays high near 3.3V, while Output 3 drops significantly toward 1.6V or lower. This drops power to the right motor, causing the vehicle to pivot right.