WT99P461-S1 Board Features

  • WT99P461-S1
  • esp32p4
  • esp32c61
2026-09-09
Update history
Date Version Author Update content
2026-09-09 1.0.0 Pail Initial document release

Introduction

WT99P461-S1 is a high-performance multimedia development board from Shenzhen Wireless-tag Co., Ltd. It combines Espressif's ESP32-P4 chip (a dual-core RISC-V processor running at 400MHz) with an ESP32-C61 wireless chip on the WT01P461-S1 core board. With a comprehensive set of interfaces and multimedia processing capabilities, the board supports applications such as smart home control, industrial HMI, medical equipment, security monitoring, and multimedia terminals. Its performance, wireless connectivity, and integration make it suitable for rapid prototyping of IPC, AIoT, and similar products.

WT99P461-S1 development board

🔧 Core Hardware Configuration

  • Main Chips: The board uses Espressif's ESP32-P4 + ESP32-C61 dual-chip architecture. The ESP32-P4 features a dual-core RISC-V 400MHz processor and 32MB PSRAM for multimedia processing and edge computing. The ESP32-C61 provides 2.4GHz Wi-Fi 6 (802.11ax) and Bluetooth 5.0 LE (with Bluetooth Mesh 1.1 support), enabling low-latency wireless connections with support for many concurrent devices.

  • Network Interface: An integrated RJ45 Ethernet port supports 10/100Mbps auto-negotiation for direct wired networking. Together with the ESP32-C61's Wi-Fi 6 connectivity, it enables coordinated wired and wireless networking for redundancy and reliable data transmission in industrial applications.

  • Multi-protocol Data Channels: The board supports seven communication interfaces: serial (UART), Ethernet, Wi-Fi 6, Bluetooth, USB 2.0 OTG, RS-485, and CAN. Developers can use the ESP-IDF SDK to implement data routing and protocol conversion between these interfaces, such as UART ↔ Ethernet passthrough, for custom industrial control applications.

🛠️ Design Features

  1. The RS-485 interface (J13) connects to an RS-485 PHY chip and complies with the TIA/EIA-485 standard for industrial communication.
  2. The onboard RJ45 Ethernet port (J12) supports 10/100Mbps auto-negotiation for Ethernet communication.
  3. The CAN bus interface (J17) connects to a CAN PHY chip for industrial and automotive bus communication.
  4. The full-speed USB 2.0 Type-C port (J3) connects to the ESP32-P4's USB 2.0 OTG Full-Speed interface. It can be used for development with ESP-IDF and can also supply power to the board.
  5. The high-speed USB 2.0 Type-A port (J4) connects to the ESP32-P4's USB 2.0 OTG High-Speed interface. The ESP32-P4 can act as a USB Host to connect to and power other USB Device peripherals.
  6. The RGB LED (D41, connected to the core board through GPIO54) can be used for custom status indications.
  7. The MicroSD card slot (J11) supports 4-bit mode for storing or playing audio files on a MicroSD card.
  8. The MIPI CSI FPC connector (J15, 1.0mm pitch, 15 pins) connects to an external camera module for image transfer.
  9. The MIPI DSI FPC connector (J9, 0.5mm pitch, 30 pins) and the CTP connector (J8, 0.5mm pitch, 6 pins) connect to an LCD expansion board.
  10. The onboard microphone (MIC1) and speaker connector (J7, supporting up to 4Ω 3.0W) connect to the onboard audio codec for voice announcements and audio playback.
  11. The C61-PROG flashing interface (J16, 1.25mm pitch, single-row straight 1x7P header) is used to flash the ESP32-C61 chip on the WT01P461-S1 core board.

📡 Main Applications

  • Industrial Control: The RS-485 and CAN interfaces connect to PLCs, sensors, and industrial equipment, while Ethernet and 2.4GHz Wi-Fi 6 provide stable and reliable network data transmission.
  • HMI: MIPI-DSI and CTP support an LCD expansion display with capacitive touch for developing local monitoring interfaces using embedded GUI frameworks such as LVGL.
  • Security and Vision Terminals: The MIPI-CSI camera interface supports image capture, while the ESP32-P4's 400MHz RISC-V cores support edge AI inference, such as face recognition.
  • Smart Home Control Systems: The onboard audio codec supports voice announcements and local command recognition. Combined with the HMI, it enables applications such as smart speakers with displays and home energy management controllers.

⚙️ Development Advantages

  • Both the onboard ESP32-P4 and ESP32-C61 can be programmed using Espressif's ESP-IDF SDK.
  • Each chip has a dedicated flashing interface (J16/J1), supporting serial flashing and debugging with ESP-TOOL.
  • All available pins on the core board are brought out to headers, allowing developers to connect peripherals with jumper wires as needed.
  • Official examples covering basic functions are available for learning and reference.

Pin Descriptions

The following tables list the names and functions of the development board's headers and pins (J20, J16, J13, and J17). Connector names correspond to the front view of the WT99P461-S1 development board, and pin numbers match the board schematic.

J20 Pin Functions

Pin Name Function
1 VCC_3V3 3.3V power supply
2 C61_GPIO9 GPIO9, ZCD1
3 VCC_3V3 3.3V power supply
4 C61_GPIO8 GPIO8, FSPICS0, ZCD0
5 VCC_5V 5V power supply
6 C61_GPIO7 GPIO7, FSPID
7 VCC_5V 5V power supply
8 C61_GPIO6 GPIO6, LP_GPIO6, MTDO, FSPICLK
9 NC Not connected
10 C61_GPIO5 GPIO5, LP_GPIO5, MTCK, ADC1_CH3
11 GND Power ground
12 C61_GPIO4 GPIO4, LP_GPIO4, MTDI, ADC1_CH2, FSPIWP
13 GND Power ground
14 C61_GPIO1 GPIO1, LP_GPIO1, XTAL_32K_N, ADC1_CH0
15 GND Power ground
16 C61_GPIO0 GPIO0, LP_GPIO0, XTAL_32K_P
17 GND Power ground
18 C61_EN ESP32-C61 chip enable
19 GPIO1 GPIO1, LP_GPIO1, XTAL_32K_P
20 C61_U0TXD GPIO11, U0TXD
21 GPIO2 GPIO2, MTCK, LP_GPIO2, TOUCH_CHANNEL1
22 C61_U0RXD GPIO10, U0RXD
23 GPIO3 GPIO3, MTDI, LP_GPIO3, TOUCH_CHANNEL2
24 NC Not connected
25 GPIO4 GPIO4, MTMS, LP_GPIO4, TOUCH_CHANNEL3
26 GPIO5 GPIO5, MTDO, LP_GPIO5, TOUCH_CHANNEL4
27 GPIO6 GPIO6, SPI2_HOLD_PAD, LP_GPIO6, TOUCH_CHANNEL5
28 GPIO21 GPIO21, ADC1_CHANNEL5
29 GPIO22 GPIO22, ADC1_CHANNEL6
30 GPIO23 GPIO23, ADC1_CHANNEL7, REF_50M_CLK_PAD
31 GPIO0 GPIO0, LP_GPIO0, XTAL_32K_N
32 GPIO41 GPIO41, SD1_CDATA2_PAD, GMAC_PHY_TXD0_PAD
33 GPIO53 GPIO53, GMAC_PHY_RXD1_PAD, ADC2_CHANNEL4, ANA_COMP1
34 GPIO42 GPIO42, SD1_CDATA3_PAD, GMAC_PHY_TXD1_PAD
35 GPIO48 GPIO48, SD1_CDATA7_PAD, GMAC_PHY_RXER_PAD
36 GPIO47 GPIO47, SD1_CDATA6_PAD, GMAC_PHY_RXD1_PAD
37 GPIO40 GPIO40, SD1_CDATA1_PAD, GMAC_PHY_TXEN_PAD
38 GPIO46 GPIO46, SD1_CDATA5_PAD, GMAC_PHY_RXD0_PAD
39 GPIO39 GPIO39, SD1_CDATA0_PAD, REF_50M_CLK_PAD
40 GPIO45 GPIO45, SD1_CDATA4_PAD, GMAC_PHY_RXDV_PAD
41 GPIO38 GPIO38, UART0_RXD_PAD, SPI2_DQS_PAD
42 GPIO36 GPIO36, SPI2_IO6_PAD, GMAC_PHY_TXER_PAD
43 GPIO37 GPIO37, UART0_TXD_PAD, SPI2_IO7_PAD
44 GPIO33 GPIO33, SPI2_WP_PAD, GMAC_PHY_TXEN_PAD
45 GPIO43 GPIO43, SD1_CCLK_PAD, GMAC_PHY_TXER_PAD
46 GPIO32 GPIO32, SPI2_HOLD_PAD, GMAC_RMII_CLK_PAD
47 GPIO44 GPIO44, SD1_CCMD_PAD, GMAC_RMII_CLK_PAD
48 GPIO27 GPIO27, USB1P1_P1
49 PWR_CTRL Power control pin
50 GPIO26 GPIO26, USB1P1_N1

J16 Pin Functions

Pin Name Function
1 GND Power ground
2 C61_GPIO9 GPIO9, ZCD1 (10K pull-up inside the module)
3 C61_EN ESP32-C61 chip enable (10K pull-up on the core board)
4 C61_U0RXD GPIO10, U0RXD
5 C61_U0TXD GPIO11, U0TXD
6 3V3 3.3V power input
7 NC Not connected

J13 Pin Functions

Pin Name Function
1 485_B Inverting receiver input and inverting driver output
2 485_A Non-inverting receiver input and non-inverting driver output

J17 Pin Functions

Pin Name Function
1 CAN_H CAN bus high line
2 CAN_L CAN bus low line

Power Characteristics

Choose one of the following methods to power the WT99P461-S1 series development board:

  • Supply power through the J1 (USB to UART) Type-C debugging port.
  • Supply power through the J3 (USB 2.0 Full-Speed) Type-C port.
  • Connect a supply at the appropriate voltage to the 3V3 or 5V power input pins on the J20 header using Dupont wires.