ESP32 Wroom Programming Jig Documentation

Input Voltage

5V (via USB)

Output Voltage

3.3V (regulated)

USB Interface

Standard USB 2.0

Supported Protocols

UART, SPI, I2C, I2S

Operating Temperature

0C to 40C

Dimensions

35mm x 25mm x 10mm (L x W x H)

Conclusion

The ESP32 Wroom Programming Jig is an essential tool for anyone working with ESP32 Wroom modules. Its compact design, auto-reset circuitry, and USB interface make it an ideal choice for programming, debugging, and testing ESP32-based IoT projects. With its versatility and ease of use, this jig is perfect for engineers, developers, and hobbyists looking to streamline their development process.

Pin Configuration

ESP32 Wroom Programming Jig Pinout Guide
The ESP32 Wroom Programming Jig is a versatile development board designed for programming and developing IoT projects based on the ESP32 microcontroller. The board features a 2x10-pin header, with a total of 20 pins, each serving a specific function. This guide provides a detailed explanation of each pin, helping you understand how to connect and utilize them effectively.
Pinout Structure:
The ESP32 Wroom Programming Jig pinout can be divided into the following sections:
Power Pins (3.3V, GND, VIN)
UART Pins (TX, RX, RTS, CTS)
SPI Pins (CLK, MOSI, MISO, CS)
JTAG Pins (TMS, TCK, TDI, TDO)
GPIO Pins (GPIO0-15, GPIO16-19)
Other Pins (EN, RST, BOOT)
Pin by Pin Explanation:
Power Pins:
1. 3.3V: Power supply pin, providing 3.3V output from the onboard voltage regulator.
2. GND: Ground pin, connected to the ground plane of the board.
3. VIN: Input voltage pin, allowing an external power source to be connected (typically 5V).
UART Pins:
4. TX ( Transmission ): UART Transmit pin, used for sending serial data.
5. RX ( Reception ): UART Receive pin, used for receiving serial data.
6. RTS ( Request to Send ): UART flow control pin, used to request transmission permission.
7. CTS ( Clear to Send ): UART flow control pin, used to indicate transmission readiness.
SPI Pins:
8. CLK ( Clock ): SPI clock pin, used to synchronize data transfer.
9. MOSI ( Master Out Slave In ): SPI master output pin, transmitting data to peripherals.
10. MISO ( Master In Slave Out ): SPI slave output pin, receiving data from peripherals.
11. CS ( Chip Select ): SPI chip select pin, enabling/disabling peripherals.
JTAG Pins:
12. TMS ( Test Mode Select ): JTAG test mode select pin, controlling JTAG interface operation.
13. TCK ( Test Clock ): JTAG clock pin, providing clock signal for JTAG interface.
14. TDI ( Test Data In ): JTAG data input pin, receiving data for testing and debugging.
15. TDO ( Test Data Out ): JTAG data output pin, transmitting data for testing and debugging.
GPIO Pins:
16. GPIO0: General-purpose input/output pin, can be configured as input, output, or other functions.
17. GPIO1: General-purpose input/output pin, can be configured as input, output, or other functions.
...
22. GPIO15: General-purpose input/output pin, can be configured as input, output, or other functions.
23. GPIO16: General-purpose input/output pin, can be configured as input, output, or other functions.
...
26. GPIO19: General-purpose input/output pin, can be configured as input, output, or other functions.
Other Pins:
27. EN ( Enable ): Chip enable pin, controlling the power state of the ESP32 microcontroller.
28. RST ( Reset ): Reset pin, used to reset the ESP32 microcontroller.
29. BOOT ( Boot Mode ): Boot mode selection pin, determining the boot mode of the ESP32 microcontroller.
Important Notes:
Always ensure proper power supply and grounding when working with the ESP32 Wroom Programming Jig.
Be cautious when handling the pins to avoid damage or electrical shock.
Refer to the datasheet and technical documentation for specific pin configurations and usage guidelines.
By following this pinout guide, you can effectively connect and utilize the ESP32 Wroom Programming Jig's pins to develop and prototype your IoT projects.

Code Examples

ESP32 Wroom Programming Jig Documentation

Overview

The ESP32 Wroom Programming Jig is a development tool designed to facilitate the programming and debugging of ESP32-based IoT projects. This jig provides a convenient and efficient way to upload firmware to ESP32 modules, allowing developers to focus on their project's functionality without worrying about the underlying hardware.

Key Features

Supports programming and debugging of ESP32 modules
 Compatible with ESP32 Wroom-02 and Wroom-03 modules
 USB interface for connectivity to a computer
 Onboard voltage regulator and level shifter for safe and reliable connections
 Reset and Boot buttons for easy firmware upload and debugging

Getting Started

To get started with the ESP32 Wroom Programming Jig, follow these steps:

1. Connect the jig to a computer using a USB cable.
2. Download and install the ESP32 development environment, such as the Arduino IDE or ESP-IDF.
3. Write and compile your firmware code using the chosen development environment.
4. Upload the firmware to the ESP32 module using the jig.

Code Examples

### Example 1: Blinking LED (Arduino IDE)

This example demonstrates how to use the ESP32 Wroom Programming Jig to upload a simple firmware that blinks an LED connected to GPIO 2.
```cpp
const int ledPin = 2;  // GPIO 2

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop() {
  digitalWrite(ledPin, HIGH);
  delay(1000);
  digitalWrite(ledPin, LOW);
  delay(1000);
}
```
Upload the code to the ESP32 module using the Arduino IDE, and observe the LED blinking.

### Example 2: Wi-Fi Network Scanner (ESP-IDF)

This example demonstrates how to use the ESP32 Wroom Programming Jig to upload a firmware that scans for nearby Wi-Fi networks.
```c
#include <esp_wifi.h>
#include <esp_log.h>

void app_main() {
  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
  esp_wifi_init(&cfg);
  esp_wifi_set_mode(WIFI_MODE_STA);

wifi_scan_config_t scan_cfg = {
    .ssid = 0,
    .bssid = 0,
    .channel = 0,
    .show_hidden = true
  };

uint16_t num_wifi_networks;
  wifi_ap_record_t wifi_networks[10];

esp_wifi_scan_start(&scan_cfg, true);
  esp_wifi_scan_get_ap_records(&num_wifi_networks, wifi_networks);

for (int i = 0; i < num_wifi_networks; i++) {
    ESP_LOGI(TAG, "SSID: %s, RSSI: %d", wifi_networks[i].ssid, wifi_networks[i].rssi);
  }
}
```
Upload the code to the ESP32 module using the ESP-IDF framework, and observe the list of nearby Wi-Fi networks printed to the serial console.

### Example 3: Serial Communication (MicroPython)

This example demonstrates how to use the ESP32 Wroom Programming Jig to upload a firmware that establishes a serial communication link with a computer.
```python
import machine
uart = machine.UART(0, 115200)

while True:
    uart.write("Hello, world!
")
    uart.readline()  # Wait for incoming data
```
Upload the code to the ESP32 module using MicroPython, and observe the serial console output on the connected computer.

Troubleshooting

Ensure the ESP32 module is properly seated in the jig.
 Verify the USB connection and driver installation.
 Check the firmware code for errors and compatibility issues.

Conclusion

The ESP32 Wroom Programming Jig is a versatile tool for developing and debugging ESP32-based IoT projects. With its ease of use and compatibility with various development environments, this jig is an essential component for any ESP32-based project.

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ESP32 Wroom Programming Jig