SP140
Intro#
The current OpenPPG SP140 Controller is based on the ESP32 platform and uses the webserial API to communicate from your browser to your device. Supported desktop browsers are listed here.
The performance mode changes the dynamics of the SP140 throttle and serves different flying styles.
“Chill” is less responsive and reduces max power to ~70%. “Sport” unlocks full power and is more sensitive to slight input changes.
We recommend flying in chill mode until you get comfortable with the instant power the OpenPPG SP140 can provide.
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You can toggle the performance mode by holding down the top button on the SP140 controller while disarmed. A beep confirms the change.
Updating firmware#
New firmware can add features and improve functionality. To update the firmware on the ESP32-based controller:
- Connect the controller to your computer via USB.
- Use the web-based firmware update tool.
- Follow the on-screen instructions to complete the update process.
Alerts
Alert Levels#
- Warning: Yellow alerts indicate conditions approaching dangerous levels
- Critical: Red alerts indicate dangerous conditions requiring immediate attention
ESC (Motor Controller) Alerts#
Temperature Alerts#
| Alert | Abbreviation | Warning Threshold | Critical Threshold | Meaning |
|---|
| ESC MOSFET Temperature | MC-F | >90°C / <-10°C | >110°C / <-20°C | High/low temperature on the ESC’s power MOSFETs |
| ESC MCU Temperature | MC-C | >80°C / <-10°C | >95°C / <-20°C | High/low temperature on the ESC’s microcontroller |
| ESC Capacitor Temperature | MC-P | >85°C / <-10°C | >100°C / <-20°C | High/low temperature on the ESC’s capacitor |
| Motor Temperature | MC-M | >105°C / <-20°C | >115°C / <-25°C | High/low temperature on the motor |
Running Errors (Critical Only)#
| Alert | Abbreviation | Trigger Condition | Meaning |
|---|
| ESC Over Current | MC-RE-0 | Active when true | ESC detected excessive current draw |
| ESC Locked Rotor | MC-RE-1 | Active when true | Motor is locked or jammed |
| ESC Over Temperature | MC-RE-2 | Active when true | ESC temperature protection triggered |
| ESC Over Voltage | MC-RE-6 | Active when true | Input voltage too high |
| ESC Voltage Drop | MC-RE-7 | Active when true | Input voltage dropped too low |
Self-Check Errors (Critical - Boot-time Hardware Faults)#
| Alert | Abbreviation | Trigger Condition | Meaning |
|---|
| Motor Current Output Bad | MC-SE-0 | Active when true | Motor current sensor malfunction |
| Total Current Output Bad | MC-SE-1 | Active when true | Total current sensor malfunction |
| Motor Voltage Output Bad | MC-SE-2 | Active when true | Motor voltage sensor malfunction |
| Capacitor NTC Bad | MC-SE-3 | Active when true | Capacitor temperature sensor malfunction |
| MOS NTC Bad | MC-SE-4 | Active when true | MOSFET temperature sensor malfunction |
| Bus Voltage Range Bad | MC-SE-5 | Active when true | Bus voltage sensor range error |
| Bus Voltage Sample Bad | MC-SE-6 | Active when true | Bus voltage sensor sampling error |
| Motor Z Too Low | MC-SE-7 | Active when true | Motor impedance too low |
| Motor Z Too High | MC-SE-8 | Active when true | Motor impedance too high |
| Motor Voltage Detect 1 Bad | MC-SE-9 | Active when true | Motor voltage detection 1 malfunction |
| Motor Voltage Detect 2 Bad | MC-SE-10 | Active when true | Motor voltage detection 2 malfunction |
| Motor Current Detect 2 Bad | MC-SE-11 | Active when true | Motor current detection 2 malfunction |
| Software/Hardware Incompatible | MC-SE-13 | Active when true | Firmware/hardware version mismatch |
| Bootloader Unsupported | MC-SE-14 | Active when true | Bootloader version not supported |
BMS (Battery Management System) Alerts#
BMS Temperature Alerts#
| Alert | Abbreviation | Warning Threshold | Critical Threshold | Meaning |
|---|
| BMS MOSFET Temperature | BC-F | >50°C / <-10°C | >60°C / <-15°C | High/low temperature on BMS power MOSFETs |
| BMS Balance Temperature | BC-B | >50°C / <-10°C | >60°C / <-15°C | High/low temperature on balance resistors |
| BMS Cell Temperatures | BC-T1/2/3/4 | >50°C / <-10°C | >56°C / <-15°C | High/low temperature in battery cell group 1-4 |
Voltage and SOC Alerts#
| Alert | Abbreviation | Warning Threshold | Critical Threshold | Meaning |
|---|
| BMS High Cell Voltage | BC-CV-H | >4.19V | >4.20V | Individual cell voltage too high |
| BMS Low Cell Voltage | BC-CV-L | <3.2V | <3.0V | Individual cell voltage too low |
| BMS State of Charge | BC-SOC | <15% | <5% | Battery charge level too low |
| BMS Total Voltage | BC-Vtot | <79.2V or >100.4V | <69.6V or >100.8V | Total battery pack voltage out of range |
| BMS Voltage Differential | BC-dV | >0.2V | >0.4V | Voltage difference between cells too high |
MOSFET State Alerts#
| Alert | Abbreviation | Trigger Condition | Meaning |
|---|
| BMS Discharge MOS | BC-DSG | Active when false (MOS off) | Discharge MOSFET unexpectedly turned off |
Internal System Alerts#
CPU Temperature Alerts#
| Alert | Abbreviation | Warning Threshold | Critical Threshold | Meaning |
|---|
| CPU Temperature | CPU-T | >60°C / <0°C | >80°C / <-10°C | ESP32-S3 processor temperature too high/low |
Notes#
- All temperature sensors use hysteresis to prevent alert bouncing (±2°C deadband)
- Voltage thresholds are absolute values without hysteresis
- Boolean alerts (errors/faults) are either active (true) or inactive (false)
- Critical alerts trigger red screen border and vibration
- Warning alerts are displayed in yellow