T1-M Wi-Fi Module

by Tuya Inc. - product page

• Info & flashing guide

Information
Board code	t1-m
MCU	Beken BK7238
Series	BK72XX
Partition layout	Tuya default for T1/BK7238 (dynamic OTA, RF 0x1E3000)
Encryption keys	-- no encryption --
Specifications
Frequency	120 MHz
Flash size	2 MiB
RAM size	256 KiB
Voltage	3.0V - 3.6V
I/O	9x GPIO, 5x PWM, 2x UART, 4x ADC
Wi-Fi	802.11 b/g/n
Bluetooth	BLE v5.2
FCC ID	2ANDL-T1-M

Usage

Board code: t1-m

In platformio.ini:

[env:t1-m]
platform = libretiny
board = t1-m
framework = arduino

In ESPHome YAML:

bk72xx:
  board: t1-m

Quick flashing guide

• ltchiptool user guide
• full flashing guide

Pin	Connection
P10 / RX1	TX of USB-UART adapter
P11 / TX1	RX of USB-UART adapter
CEN (Chip-Enable)	GND to reset the chip

1. Connect the USB-UART adapter.
2. Start the flashing process.
3. Keep shorting CEN to GND or power-cycling the device, until flashing starts.

Pinout

Pin functions

Name(s)	UART	I²C	SPI	PWM	Other
P0	TX2
P1, ADC5	RX2
P6				PWM0
P8				PWM2
P9				PWM3
P10, ADC6	RX1
P11	TX1
P24, ADC2		SCL2		PWM4
P26, ADC1		SDA2		PWM5

Flash memory map

Flash size: 2 MiB / 2,097,152 B / 0x200000

Hex values are in bytes.

Name	Code	Start	Length	End
Bootloader	bootloader	0x000000	68 KiB / 0x11000	0x011000
App Image	app	0x011000	1.1 MiB / 0x11B000	0x12C000
OTA Image	download	0x12C000	724 KiB / 0xB5000	0x1E1000
OTA Info (Tuya)	diff2ya	0x1E1000	4 KiB / 0x1000	0x1E2000
(reserved)	-	0x1E2000	4 KiB / 0x1000	0x1E3000
Calibration	calibration	0x1E3000	4 KiB / 0x1000	0x1E4000
LibreTiny Storage	kvs	0x1E4000	32 KiB / 0x8000	0x1EC000
User Data	userdata	0x1EC000	80 KiB / 0x14000	0x200000
Tuya Storage	tuya	0x1F5000	44 KiB / 0xB000	0x200000

Bootloader and app partitions contain CRC16 sums every 32 bytes. That results in the actual flash offsets/sizes not aligned to sector boundaries. To simplify calculations, the values shown in the table (extracted from bootloader's partition table) were aligned to 4096 bytes.