4.2″ ST‐GR42 - OpenEPaperLink/OpenEPaperLink GitHub Wiki

Specs

  • ZBS243 (SEM9110) SoC (8051 based core) @ 16 MHz
    • 64 kB Flash ROM
    • 8 kB xRAM
    • 256 Bytes iRAM
    • 1 MB SPI Flash (???)
    • 802.15.4 Radio (2.4 Ghz)
  • 4.2" SSD1619A EPaper Display (BWR) with 400 x 300 px
  • 2 x CR2450 button cells
    • 3 x CR2450 button cells (GR42RG0/GM42KC0/GR42003N/GM42003N)
  • Unknown NFC controller (N/N2 models only, see table)

Models

Model MAC ID Options Note Label
ST-GM42003 401 BW, No NFC
ST-GM42003N 403 NFC BW
ST-GM42KC0 401 BW, No NFC, 3 x CR2450
ST-GR42003 481 BWR, No NFC
ST-GR42003N 483 NFC BWR
ST-GR420x3N2 483 NFC BWR, x = Case color ST-GR420x3N2 Label
ST-GR42RG0 411 BWR, No NFC, 3 x CR2450 ST-GR42RG0 Label
Tag Information Note
FCC ID 2AFWN-ST-GR42003N Solum tag
FCC ID E2X-ST-GM42003N Original Samsung tag

[!NOTE] MAC ID = tag size & type (2 digits, e.g. 48) + panel & nfc type (1 digit, e.g. 3)

Photos

ST-GR420x3N2 (e.g. GR42003N2, GR420B3N2)

Front Back PCB
Front Back PCB

ST-GR42RG0

ST-GR42RG0 Front ST-GR42RG0 Back ST-GR42RG0 PCB
Front Back PCB

Manual

EPaper Display (SSD1619A) Pins

ZBS243 SSD1619 Note
P1.7 CS Active Low
P2.1 Busy Active High
P2.2 D/C High for data / Low for commands
P2.0 RESET Active Low
P0.0 SPI_CLK
P0.1 MOSI/MISO Used for both; same pin to read data

Programming

Programming pins
Programming pins

Various programming jigs have been made for this tag.

It can be flashed using the AP-Flasher board or one of the various flashers in ATC1441's ZBS_Flasher repo.

Original Firmware File Hashes

Version Type MD5 (first 10kbyte) Original Tag Mac (as written on case) Note
031 ST-GR29000 52B8F6316BC2EB45231B23B2CD563B80 02393A793B16