LILYGO T-PICOC3 Combines RP2040 and ESP32 in a Single Board User Guide

T-PicoC3

User Guide

Version 1.1
Copyright © 2022

About This Guide

This document is intended to help users set up the basic software development environment for developing applications using hardware based on the T-PicoC3.
Through a simple example, this document illustrates how to use Arduino , including the menu based configuration wizard, compiling the Arduino and firmware download to the ESP32 module.

Release Notes

1. Introduction

1.1. T-PicoC3

T-PicoC3 is a development board. It can work independently.

It consists of ESP32-C3 MCU supporting Wi-Fi + BLE communication protocol and RP2040 MCU. And this product has an LCD screen. The screen specification is 1.14-inch ST7789V IPS LCD.

For applications ranging from low-power sensor networks to the most demanding tasks.

At the core of this module is the ESP32-C3 chip.
ESP32-C3 integrates Wi-Fi (2.4 GHz band) and Bluetooth 5.0 solutions on a single chip, along with dual high performance cores and many other versatile peripherals. Powered by 40 nm technology, ESP32 provides a robust, highly integrated platform to meet the continuous demands for efficient power usage, compact design, security.

Xinyuan provides the basic hardware and software resources that empowers application developers to build their ideas around the ESP32-C3 series hardware. The software development framework provided by Xinyuan is intended for rapidly developing Internet-of-Things (IoT) applications, with Wi-Fi, Bluetooth, flexible power management and other advanced system features.

1.2. Arduino

A set of cross-platform applications written in Java. The Arduino Software IDE is derived from the Processing programming language and the integrated development environment of the Wiring program. Users can develop applications in Windows/Linux/ MacOS based on Arduino. It is recommended to use Windows 10. Windows OS has been used as an example in this document for illustration purposes.

1.3. Preparation

To develop applications for ESP32-C3 you need:

• PC loaded with either Windows, Linux or Mac operating system
• Toolchain to build the Application for ESP32-C3
• Arduino that essentially contains API for ESP32 and scripts to operate the Toolchain
• The ESP32-C3 board itself and a USB cable to connect it to the PC

2. Get Started

2.1. Download the Arduino Software

The quickest how to install the Arduino Software (IDE) on Windows machines

2.1.1. Quick Start Guide

The website provides a quick start tutorial

• Windows:

https://www.arduino.cc/en/Guide/Windows

• Linux:

https://www.arduino.cc/en/Guide/Linux

• Mac OS X:

https://www.arduino.cc/en/Guide/MacOSX

2.1.2. Installation steps for Windows platform Arduino

Enter the download interface, select Windows installer to install directly

2.2. Install the Arduino Software

Wait for installation

3. Configure

3.1. Download Git

Download the installation package Git.exe

3.2. Pre-build configuration

Click Arduino icon, then right click and select “pen folder where”
Select hardware ->
Mouse Right click ->
Click Git Bash Here

3.3. Cloning a remote repository

$ mkdir espressif
$ cd espressif
$ git clone –recursive https://github.com/espressif/arduino-esp32.git esp32

4. Connect

You are almost there. To be able to proceed further, connect ESP32-C3 board to PC, check under what serial port the board is visible and verify if serial communication works.

5. Test Demo

Select File>>Example>>WiFi>>WiFiScan

6. Upload Sketch

6.1. Select Board

Tools <<Board<<ESP32C3 Dev Module

6.2. Upload

Sketch << Upload

6.2. Serial Monitor

Tools << Serial Monitor

7. SSC Command Reference

Here lists some common Wi-Fi commands for you to test the module.

7.1. op

Description

op commands are used to set and query the Wi-Fi mode of the system.

Example

op -Q
op -S -o wmode

Parameter

Table 6-1. op Command Parameter

• mode = 1: STA mode
• mode = 2: AP mode
• mode = 3: STA+AP mode

7.2. sta

Description

sta commands are used to scan the STA network interface, connect or disconnect AP, and query the connecting status of STA network interface.

Example

sta -S [-s ssid] [-b bssid] [-n channel] [-h] sta -Q
sta -C [-s ssid] [-p password] sta -D

Parameter

Table 6-2. sta Command Parameter

7.3. ap

Description

ap commands are used to set the parameter of AP network interface.

Example

ap -S [-s ssid] [-p password] [-t encrypt] [-n channel] [-h] [-m max_sta] ap -Q
ap ­-L

Parameter

Table 6-3. ap Command Parameter

7.4. mac

Description

mac commands are used to query the MAC address of the network interface.

Example

mac -Q [-o mode]

Parameter

Table 6-4. mac Command Parameter

• mode = 1: MAC address in STA mode.
• mode = 2: MAC address in AP mode.

7.5. dhcp

Description

dhcp commands are used to enable or disable dhcp server/client.

Example

dchp -S [-o mode] dhcp -E [-o mode] dhcp -Q [-o mode]

Parameter

Table 6-5. dhcp Command Parameter

• mode = 1 : DHCP client of STA interface.
• mode = 2 : DHCP server of AP interface.
• mode = 3 : both.

7.6. ip

Description

ip command are used to set and query the IP address of the network interface.

Example

ip -Q [-o mode] ip -S [-i ip] [-o mode] [-m mask] [-g gateway]

Parameter

Table 6-6. ip Command Parameter

• mode = 1 : IP address of interface STA.
• mode = 2 : IP address of interface AP.
• mode = 3 : both

-S| Set IP address.
-i ip| IP address.
-m mask| Subnet address mask.
-g gateway| Default gateway.

7.7. reboot

Description

reboot command is used to reboot the board.

Example

reboot

7.8. ram

ram command is used to query the size of the remaining heap in the system.

Example

ram

Xinyuan 2022.07

FCC Caution:

Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

IMPORTANT NOTE:

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.

FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.

References

• GitHub - espressif/arduino-esp32: Arduino core for the ESP32
• arduino.cc/en/Guide/Linux
• arduino.cc/en/Guide/MacOSX
• arduino.cc/en/Guide/Windows

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