Two weeks ago, the PineTime was teased on Twitter as an extremely inexpensive (~$25) open source PinePhone companion smartwatch, running FreeRTOS on a low-power ARM Cortex-M4 core. More detailed information has been released just hours ago on the official PINE64 wiki page for the PineTime, including pictures of the current prototype, in-depth technical specifications and hardware datasheets, detailed pricing and planned release schedule.

Back of the PineTime smartwatch, with charging pins and heart rate sensor

Full technical specifications

Detailed technical specifications have been revealed for this smartwatch, the most relevant of which have been condensed below:

Body: zinc alloy and plastic casing, 37.5x40x11mm, 38 grams weight

SoC: NORDIC Semiconductor nRF52832 (64MHz ARM Cortex-M4F, may be upgraded to nRF52840)

Display: 1.3", 240x240 IPS LCD capacitive touchscreen (RGB 65K colors)

OS: Various open source RTOS such as Zephyr, FreeRTOS, Mbed and NuttX

Internal memory: 512KB flash, 64KB DRAM, 8MB SPI NOR Flash (may be upgraded to 16MB)

Wireless connectivity: Bluetooth 5.0 + Low Energy/BLE

Battery: LiPo, 170-180mAh (probably 3/4-day battery life?), charging via cradle pogo pins (5V@500mA)

Other sensors: accelerometer, PPG heart rate sensor, vibration motor

Certifications: still unknown, likely IP67 (source) and RoHS

PineTime USB charging cradle with pogo pins

Hardware breakdown and datasheets

The PineTime will use the following internal hardware components, whose datasheets can be found here and (more up-to-date) on the official wiki page:

SoC/MCU: NORDIC nRF52832 or nRF52840

PMU (Power Management Unit): SGMicro SGM40561 and SGMicro SGM2036

SPI Flash: Macronix 8MB SPI NPR Flash or 16MB variant

IPS LCD panel: WIP schematics; datasheet for Sitronix ST7789V LCD

Touch panel: WIP schematics; datasheet for Nynitron CST816S (Chinese only)

Sensors: BOSCH BMA421 accelerometer; TianYiHeXin HRS3300 heart rate sensor

For all those of you whom contacted us regarding #PineTime development, and those interested in the project, you may wish to join the chat/protocol of your choice. Chats are listed in drop-down menu on main page https://t.co/P9UBvGNVFA pic.twitter.com/dPK5J3Vqgt — PINE64 (@thepine64) September 15, 2019

The PineTime will be sold for the price of USD $22.99 inclusive of the charging cradle. Generic 20mm wristbands for this device will be sold for $2 and up, and will include silicone, NATO, "Milanese" steel and leather styles.

The development kit for the PINE64 PineTime will become available within a month, in October 2019, whereas the expected release date for the final product will be in Q1 or Q2 2020, pending on development results. The PineTime will have an availability of at least 5 years, according to the current announcement.