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E32R35T-TopView
E32R35T-BottomView
Product Description
- Comes with ESP32-WROOM-32E module, easy development, sufficient development resources
- 3.5-inch color screen, 320x480 resolution 65K color, display color rich
- Rich interface, easy to connect a variety of peripherals (I2C, SPI, UART,etc.)
- Supports external speakers to play audio
- Comes with RGB three-color indicator, indicating rich status
- Comes with resistive touch screen, easy man-machine interaction
- Standard TYPE-C interface for easy program download and power supply
- Equipped with micro TF card slot for easy storage expansion
- Support external lithium battery, lightweight and portable
- Equipped with battery charging management circuit to ensure safe battery charging and discharging
- Provide rich example learning programs, easy to learn
- Provide low-level driver technical support, and update WIKI information online
- Multiple tests for module aging can meet military level standards, supporting long-term stable work
Product Parameters
ESP32 Parameters
| Name | Parameter |
|---|---|
| Module | ESP32-WROOM-32E |
| CPU | ESP32-D0WD-V3,Xtensa dual-core 32-bit LX6 microprocessor |
| Frequency | 240MHz(Max) |
| Memory | 48KB ROM+520KB SRAM+16KB RTC SRAM+4MB external QSPI Flash |
| WIFI | 2.4GHz and 802.11b/g/n modes |
| Bluetooth | Bluetooth V4.2BR /EDR and Bluetooth LE standards |
| Operating Voltage | 3.0~3.6(V) |
| Operating Temperature | –40~85(℃) |
LCD Parameters
| Name | Parameter |
|---|---|
| Panel Size | 3.5 inch |
| Panel Type | TN TFT |
| Resolution | 320xRGBx480(pixels) |
| Active Area | 48.96(W)x73.44(H)(mm) |
| Number of Colors(Max) | 16.7M |
| Driver IC | ST7796U |
| Display Interface | 4-Line SPI(Connect to ESP32) |
| Pixel Size | 0.153(H)x0.153(mm) |
| View Angle | 12 0’CLOCK |
| Brightness(TYP) | 300 cd/m2 |
| Backlight Type | White LED*6 |
| Operation Temperature | -10~50(℃) |
| Storage Temperature | -20~60(℃) |
Touch Screen Parameters
| Name | Parameter |
|---|---|
| Touch Active Area | 3.5 inch |
| Touch Screen Type | Resistive touch screen |
| Touch Screen Resolution | 320x480(pixels) |
| Driver IC | XPT2046 |
| Touch Screen Visual Area | 49.50(W)x77.24(H)(mm) |
| Communication Interface | SPI |
| Material | ITO film +ITO glass |
| Operation Temperature | -10~60(℃) |
| Storage Temperature | -20~70(℃) |
Size Parameters
| Name | Parameter |
|---|---|
| LCD Outline Size | 55.50±0.2(W)x84.96±0.2(H)x2.5±0.1(D)(mm)(Excluding cables and adhesive backing) |
| Touch Screen Outline Size | 55.0±0.2(W)x84.36±0.2(H)x1.20 (D)(mm)(Excluding cables and adhesive backing) |
| Module Outline Size | 55.50(W)x101.50(H)x5.80(D)(mm) |
Battery Charging Parameters
| Name | Parameter |
|---|---|
| Charging Voltage | Range: 4.2 to 6.5
Typical value: 5 |
| Charging Current | Max. : 500
Module Actual value: 290 |
| Charging Saturation Voltage | 4.24V |
| Charging Temperature | Module maximum value:62℃ |
| Rechargeable Battery Specifications | 3.7V polymer lithium battery |
Electrical Parameters
| Name | Parameter |
|---|---|
| Working Voltage | 5.0V |
| Backlight Current | 104mA |
| Total Current | ESP32 reset: 40
Only the display works: 160 Display, speaker, battery charging all work: 510 |
| Power | 0.8W(Display only works) |
Basic Parameters
| Name | Parameter |
|---|---|
| SKU | E32R35T |
| Power Supply Interface | TYPE-C |
| Weight(including package) | 90g |
Interface Definition
Interface Function Description
| Interface Name | Function Description |
|---|---|
| ESP32-WROOM-32E Module | Display module main control,control board peripheral and external peripheral. |
| MicroSD card slot | A MicroSD card is inserted to expand the storage space for storing large data such as characters, pictures, and audio files. |
| RGB LED | Contains red, green, blue three colors of LED lights, each light can be controlled by IO, used to indicate the status. |
| Serial port | 1.25mm 4P connector.It can be used for serial debugging, downloading, and communication. An external USB to serial port module is required. |
| Battery Interface | 1.25mm 2P connector.Used to connect 3.7V polymer lithium battery, charge the battery through the battery charge management circuit, can also be used for battery power supply. Note the positive and negative terminals of the interface. |
| BOOT Key | Used to enter download mode or key test. Press and hold this button to power on and release it to enter the download mode. Alternatively, press and hold this button and then press the RESET button to release the RESET button and then release this button to enter the download mode. When you do not need to enter the download mode, this button can be used as a common button. |
| Type-C Interface | Used for module power supply and download programs. This interface is connected to the one-click download circuit on the module, which can automatically enter the download mode (without pressing the BOOT key). |
| RESET Key | Used for ESP32 master control and LCD reset, level reset after pressing. |
| Expand the input pin | 1.25mm 2P connector. IO35 and IO39 are two input-only IOs that are used to access input signals. |
| Speaker Interface | 1.25mm 2P connector. Used to access the speaker to play audio. |
| SPI peripheral interface | 1.25mm 4P connector. For external connection to devices that use IIC communication. It can be used as ordinary IO. |
| I2C peripheral interface | 1.25mm 4P connector. For external connection to devices that use IIC communication. It can be used as ordinary IO. |
ESP32引脚分配
| 板载设备 | ESP32连接引脚 | 板载设备引脚说明 |
|---|---|---|
| 液晶屏 | IO15 | 液晶屏片选控制信号，低电平有效 |
| IO2 | 液晶屏命令/数据选择控制信号
高电平：数据，低电平：命令 | |
| IO14 | SPI总线时钟信号（液晶屏和触摸屏共用） | |
| IO13 | SPI总线写数据信号（液晶屏和触摸屏共用） | |
| IO12 | SPI总线读数据信号（液晶屏和触摸屏共用） | |
| EN | 液晶屏复位控制信号，低电平复位（和ESP32-32E主控共用复位引脚） | |
| IO27 | 液晶屏背光控制信号（高电平点亮背光，低电平关闭背光） | |
| 电阻触摸屏 | IO14 | SPI总线时钟信号（触摸屏和液晶屏共用） |
| IO13 | SPI总线写数据信号（触摸屏和液晶屏共用） | |
| IO12 | SPI总线读数据信号（触摸屏和液晶屏共用） | |
| IO33 | 电阻触摸屏片选控制信号，低电平有效 | |
| IO36 | 电阻触摸屏触摸中断信号，产生触摸时，输入低电平到主控 | |
| RGB三色灯 | IO22 | 红色LED灯（共阳极，低电平点亮，高电平关闭） |
| IO16 | 绿色LED灯（共阳极，低电平点亮，高电平关闭） | |
| IO17 | 蓝色LED灯（共阳极，低电平点亮，高电平关闭） | |
| MicroSD 卡 | IO5 | SD卡片选信号，低电平有效 |
| IO23 | SD卡SPI总线写数据信号（MicroSD 卡和SPI外设共用） | |
| IO18 | SD卡SPI总线时钟信号（MicroSD 卡和SPI外设共用） | |
| IO19 | SD卡SPI总线读数据信号（MicroSD 卡和SPI外设共用） | |
| 音频 | IO4 | 音频使能信号，低电平使能，高电平禁止 |
| IO26 | 音频信号DAC输出信号 | |
| 按键 | IO0 | 下载模式选择按键（按住该按键上电，然后松开就会进入下载模式） |
| EN | ESP32-23E复位按键，低电平复位（和液晶屏复位共用） | |
| 串口 | RXD0(IO3) | ESP32-32E串口接收信号（如果不使用串口，可做普通IO使用） |
| TXD0(IO1) | ESP32-32E串口发送信号（如果不使用串口，可做普通IO使用） | |
| 电池 | IO34 | 电池电压ADC值获取信号（输入） |
| SPI外设 | IO21 | SPI外设片选信号，低电平有效（如果不使用SPI设备，可做普通IO使用） |
| IO18 | SPI外设的SPI总线时钟引脚
（SPI外设和MicroSD 卡共用，如不使用SPI设备或者SD卡，可做普通IO使用） | |
| IO19 | SPI外设的SPI总线读数据引脚
（SPI外设和MicroSD 卡共用，如不使用SPI设备或者SD卡，可做普通IO使用） | |
| IO23 | SPI外设的SPI总线写数据引脚
（SPI外设和MicroSD 卡共用，如不使用SPI设备或者SD卡，可做普通IO使用） | |
| I2C外设 | IO25 | I2C外设的I2C总线时钟引脚（如果不使用I2C设备，可做普通IO使用） |
| IO32 | I2C外设的I2C总线数据引脚（如果不使用I2C设备，可做普通IO使用） | |
| 未使用 | IO35 | 只能做输入IO使用 |
| IO39 |
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