Bluetooth Robot Car Controller using ESP32
This wireless robot car controller board is built using an ESP32 BT/Wi-Fi module, 2 x H-Bridges, 3.3V regulator. It also includes an ESP32 programming connector, power LED, screw terminal connector for the power supply, header connector for motors, and high-value capacitors on the DC supply for smooth motor operations. The operating power supply is 8V to 24V DC. The project has two H-brides and each can drive 2.5A continues. The board is suitable for small and medium-sized robot cars. It is an open-source hardware project that can be programmed as per requirement. ESP32 I/O details are available in descriptions. ESP32 supports Bluetooth connectivity and the robot car can be controlled using a small phone, Laptop, or Tablet. The project was built using an ESP32-Wroom processor and this chip supports Bluetooth and Wi-Fi connectivity.
The project can be tested with example Arduino code which is provided below. The user will be able to drive a robot car with a PS3 Bluetooth remote. Refer to the link below to learn more about PS3 and ESP32 pairing, and ESP32 programming under Arduino IDE.
Features
- Power Supply 8V to 24V DC
- Motor Load d up to 2.5A, Peak 6Amps Each Motor
- Over Current Shutdown Threshold 8Amps
- No Heatsink for H-Bridge
- PWM Frequency Up to 20Khz (Tested), ESP32 Default Output 500Hz
- Board Power LED
- Overtemperature Shut down with Latch Behaviour, H-Bridge
- Short Circuit Shut Down with Latch Behaviour, H-Bridge
- Chopper Current Limitation, H-Bridge
- VDD Undervoltage Shutdown
- 4 x 3 mm Mounting Holes
- PCB Dimensions 48.90 x 41.28 mm
Connections
- CN1: Pin 1 VDD 8V to 24V, Pin 2 = GND
- CN2: Pin 1 & 2 = Motor 1, Pin 3 & 4 = Motor 1
- CN3: Pin 1 = 3.3V, Pin 2 = GND, Pin 3 = TX, Pin 4 = RX, Pin 5 = GPIO0, Pin 6 = Enable (Programming Connector)
- CN4: Pin 1 & 2 = Motor 2, Pin 3 & 4 = Motor 2
- J1: Jumper Closed (Pull Low) = Enable, can be controlled using ESP32 Pin GPIO16 Pin High = Disables Motor 1
- J1: Jumper Closed (Pull Low) = Enable, can be controlled using ESP32 Pin GPIO18 Pin High = Disables Motor 2
- D1: Power LED
- U4: 3.3V Regulator, Provides 3.3V to ESP32 processor input from Motor Supply 8V to 24V
- U2: H-Bridge Motor Driver, Motor 1
- U3: H-Bridge Motor Driver, Motor 2
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This wireless robot car controller board is built using an ESP32 BT/Wi-Fi module, 2 x H-Bridges, 3.3V regulator. It also includes an ESP32 programming connector, power LED, screw terminal connector for the power supply, header connector for motors, and high-value capacitors on the DC supply for smooth motor operations. The operating power supply is 8V to 24V DC. The project has two H-brides and each can drive 2.5A continues. The board is suitable for small and medium-sized robot cars. It is an open-source hardware project that can be programmed as per requirement. ESP32 I/O details are available in descriptions. ESP32 supports Bluetooth connectivity and the robot car can be controlled using a small phone, Laptop, or Tablet. The project was built using an ESP32-Wroom processor and this chip supports Bluetooth and Wi-Fi connectivity.
The project can be tested with example Arduino code which is provided below. The user will be able to drive a robot car with a PS3 Bluetooth remote. Refer to the link below to learn more about PS3 and ESP32 pairing, and ESP32 programming under Arduino IDE.
Features
- Power Supply 8V to 24V DC
- Motor Load d up to 2.5A, Peak 6Amps Each Motor
- Over Current Shutdown Threshold 8Amps
- No Heatsink for H-Bridge
- PWM Frequency Up to 20Khz (Tested), ESP32 Default Output 500Hz
- Board Power LED
- Overtemperature Shut down with Latch Behaviour, H-Bridge
- Short Circuit Shut Down with Latch Behaviour, H-Bridge
- Chopper Current Limitation, H-Bridge
- VDD Undervoltage Shutdown
- 4 x 3 mm Mounting Holes
- PCB Dimensions 48.90 x 41.28 mm
Connections
- CN1: Pin 1 VDD 8V to 24V, Pin 2 = GND
- CN2: Pin 1 & 2 = Motor 1, Pin 3 & 4 = Motor 1
- CN3: Pin 1 = 3.3V, Pin 2 = GND, Pin 3 = TX, Pin 4 = RX, Pin 5 = GPIO0, Pin 6 = Enable (Programming Connector)
- CN4: Pin 1 & 2 = Motor 2, Pin 3 & 4 = Motor 2
- J1: Jumper Closed (Pull Low) = Enable, can be controlled using ESP32 Pin GPIO16 Pin High = Disables Motor 1
- J1: Jumper Closed (Pull Low) = Enable, can be controlled using ESP32 Pin GPIO18 Pin High = Disables Motor 2
- D1: Power LED
- U4: 3.3V Regulator, Provides 3.3V to ESP32 processor input from Motor Supply 8V to 24V
- U2: H-Bridge Motor Driver, Motor 1
- U3: H-Bridge Motor Driver, Motor 2
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