ESP32-Touch-LCD-3.5 - ESP32 development board with LCD 3.5" 320x480 with battery - Waveshare 32870

Description

The ESP32-Touch-LCD-3.5 is designed for projects requiring a touch interface, wireless communication, and audio functionality integrated into a single device. The board is based on the ESP32-WROOM-32 module with a dual-core Xtensa LX6 processor clocked up to 240 MHz, enabling development of IoT applications, HMI interfaces, and control systems.

The capacitive IPS display with a 3.5inch diagonal and 320x480 resolution provides clear visuals and wide viewing angles. The ST7796 display driver and FT6336 touch controller communicate via SPI and I2C respectively, reducing GPIO usage. The onboard ES8311 audio codec, microphone, and speaker enable voice interaction features and Bluetooth audio playback.

The board supports 2.4 GHz Wi-Fi as well as Bluetooth Classic and BLE. The integrated AXP2101 power management IC ensures stable operation, supports battery charging, and manages power consumption. This version is supplied with a 3.7 V lithium battery, enabling portable operation without continuous external power.

                                                                                                                                Onboard resources

1. ESP32-DOWDR2-V3 (on the back) - The SoC with Wi-Fi and Bluetooth, up to 240MHz main frequency, with onboard 2MB PSRAM
2. 16MB NOR Flash (on the back)
3. IPEX 1 connector - Reserved connector, enabled via resoldering an onboard resistor
4. Onboard antenna
5. TF card slot
6. MX1.25 speaker header
7. BOOT button
8. RESET button
9. PWR button - long press for 6s to shut down by default, short press to power on
10. AXP2101 - Highly integrated power management IC
11. Charging indicator
12. Power supply indicator
13. Type-C port
14. Microphone
15. PCF85063 - RTC clock chip
16. ES8311 - Low power audio codec IC
17. 2.54mm pitch GPIO header - Adapting available I/O function pins for easy expansion
18. MX1.25 Lithium Batt. Header - MX1.25 2PIN connector, for 3.7V Lithium Batt., supports charging and discharging

                                                                                                                            Pin definition

Features

• Microcontroller: ESP32-WROOM-32, Xtensa LX6, up to 240 MHz
• RAM: 520 kB SRAM
• PSRAM: 2 MB
• Flash memory: 16 MB
• Wireless connectivity: Wi-Fi 2.4 GHz 802.11b/g/n, Bluetooth 4.2 BR/EDR and BLE
• Display: 3.5inch IPS, capacitive touch
• Display resolution: 320 x 480
• Color depth: 262k
• LCD driver: ST7796
• Touch controller: FT6336
• Audio codec: ES8311
• Audio components: built-in microphone and speaker
• RTC: PCF85063
• Power management: AXP2101
• Interfaces: USB Type-C, SPI, I2C, UART, GPIO
• Card reader: TF card slot
• Buttons: PWR, BOOT, RESET
• Power supply: 5 V via USB Type-C or 3.7 V battery
• Battery connector: MX1.25 2-pin for 3.7 V Li-Ion/Li-Po battery
• Weight: 99 g

Kit includes

• ESP32-Touch-LCD-3.5 development board
• 3.7 V lithium battery