2.9″ ST‐GR29000 - OpenEPaperLink/OpenEPaperLink GitHub Wiki
Probably not the most common (That award probably goes to the segmented tags used in many German supermarkets, for example, REWE), but surely the most seen in second hand supply. Multiple versions exist, and there are models with, and without NFC. Low-temperature models also exist.
- ZBS 243 / SEM9110 8051 based core, 64kbyte flash, 8kbyte XRAM, 256 bytes iRAM 16 MHz, 802.15.4 2.4Ghz radio
- 2.9” ePaper display SSD1619 or UC8151 (BWR) 296x128px
- 1Mbyte SPI flash
- 2x CR2450 button cell
- Optional NXP NFC controller (I2C)
On 37C3 we saw that some NFC devices (UC8151) exhibit problems with the latest firmware in combination with the Nano AP. Some vertical lines show random patterns, especially to the left and / or right of the tag. According to one dev we spoke to, this is a known problem but hard to debug. A solution to this is to downgrade to version 19 of the FW; however do not attempt to perform a wireless firmware downgrade via the web interface with the Nano AP. Since the error will most likely appear for the FW downgrade as well, the device will be soft bricked and will need to be re-flashed via the pins. A wireless downgrade with the Yellow AP worked fine.
| Model | MAC Id | Options | Note | Label |
|---|---|---|---|---|
| ST-GR29000 | 3B1 | No NFC |  |
|
| ST-GR2900N | 3B3 | NFC | has '1177' on the back label, for NFC |  |
| ST-GR2900L | 3B3 | Low temperature, NFC | Asterisk (*) on the front label |  |
| Tag Information | Note | |
|---|---|---|
| FCC ID | 2AFWN-ST-GM29XX2N |
USER-MANUAL-2AFWN-ST-GM29XX2N-For-ST-GM29XX2N-r1-2816154.pdf
| ZBS243 Pin | EPD | 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 |
Various programming jigs have been made for this tag; it can be flashed using the AP-Flasher board or the various flashers in ATC1441's ZBS_Flasher Repo.
| Version | Type | MD5 (first 10kbyte) | Original Tag Mac (as written on case) | Note |
|---|---|---|---|---|
| 031 | ST-GR29000 | 52B8F6316BC2EB45231B23B2CD563B80 | 02393A793B16 | |
| 032 | ST-GR29000 | DA5B33EFBEEB9496B4489B60523EB00C | 026DCB0A3B1D | |
| 033 | ST-GR29000 | A41315C16017BA64CF5BE12DFCA0F781 | 02BCD3583B1F | |
| 032 | ST-GR2900N | F707C29A240D7DD237C3C1265FAF4B68 | 018150243B30 | |
| 033 | ST-GR2900N | D7E45FEECA144BB4ED750BEADE2CAD0A | 01810D8E3B38 | |
| 025 | ST-GR2900L | 4643F4F74321FC9B4F9F0ECBD93B74AB | 01981A0D3B3D | Uses UC8151 |
| 026 | ST-GR2900L | 9E4CC058C9DF596FAC0A090E1646CBAC | 01A6CC673B37 | Uses UC8151 |