LILYGO is selling the T-Halow P4, a development board in the M.2 2280 format (80 x 22 mm) that puts three chips on one stick: an ESP32-P4 as the main chip, an ESP32-C6 for Wi-Fi 6, Bluetooth and 802.15.4, and a Taixin TX-AH module for Wi-Fi HaLow (802.11ah). CNX Software covered it on 23 October 2026.

What is on the board

The ESP32-P4NRW32X has two RISC-V cores at 400 MHz plus a low-power core at up to 40 MHz, a hardware H.264 encoder for video up to 1080p30, and a 2D graphics accelerator. LILYGO's GitHub and wiki list 32 MB of PSRAM while the product page says 8 MB, so check before ordering if memory matters. There is 16 MB of flash.

The ESP32-P4 has no radio of its own. Wi-Fi 6, Bluetooth 5 and 802.15.4 (Zigbee, Thread, Matter) come from an ESP32-C6-MINI-1U connected over SDIO, with an external antenna connector.

The HaLow module is the part that sets the board apart:

  • two versions, 859-894 MHz or 902-928 MHz, chosen by the SAW filter fitted;
  • channel widths of 1, 2, 4 or 8 MHz and throughput from 150 kbit/s to 32.5 Mbit/s;
  • a range of up to 1.2 km in line of sight, according to the specifications;
  • its own antenna connector.

There are 2-lane MIPI CSI and MIPI DSI connectors for a camera (OV2710 is supported) and a touch display. USB-C provides 5 V power and programming. Everything else, including GPIO, I2C, UART, ADC and SD, goes out through the M.2 B-key edge connector, so the board is meant to sit in a carrier board of your own design.

Software

LILYGO's GitHub examples cover HaLow communication, the camera and the display. They need ESP-IDF 5.4.1 or newer. The ESP32-P4 sends data to the HaLow module over SPI and configures it with AT commands over UART. A browser tool configures the HaLow module over Web Serial.

Price and the European band

The board costs $36.98 on AliExpress. LILYGO's own store has it for $26.57 from a warehouse in China, or $31.07 for the 915 MHz version (H777) shipped from the US.

For European buyers, the 902-928 MHz version is the wrong one: that band is used in the Americas. Europe uses 863-868 MHz, which falls inside the range of the 859-894 MHz variant.

Compared with the earlier T-HaLow

LILYGO's earlier T-HaLow used an ESP32-S3 with the same Taixin module, plus an RJ45 Ethernet port, a microSD slot and an 18650 battery holder. The P4 version drops those in favour of a faster chip, MIPI camera and display interfaces and Wi-Fi 6 through the ESP32-C6. CNX Software suggests compact IoT gateways, remote cameras and industrial monitoring as uses. Asked in the comments what the board is for, the CNX Software editor replied that long-range cameras are the main use of HaLow, but he was not sure about this particular kit.