https://github.com/tracyspacy/nrf52811-solum-tag

Flashing your own code to an epaper price tag
https://github.com/tracyspacy/nrf52811-solum-tag

eink embedded epaper rust rust-embedded

Last synced: 6 months ago
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Flashing your own code to an epaper price tag

• Host: GitHub
• URL: https://github.com/tracyspacy/nrf52811-solum-tag
• Owner: tracyspacy
• License: mit
• Created: 2025-02-02T16:04:44.000Z (8 months ago)
• Default Branch: main
• Last Pushed: 2025-02-08T11:43:28.000Z (8 months ago)
• Last Synced: 2025-02-10T03:17:39.464Z (8 months ago)
• Topics: eink, embedded, epaper, rust, rust-embedded
• Language: Rust
• Homepage:
• Size: 14.6 KB
• Stars: 53
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Flashing your own code to nrf52811-solum-tag using a raspberry pico as a debug probe



### Foreword: 

I recently got a Solum EL029H4WRC price tag (N52811 chip) and decided to flash my own code to it and use the tag as a conference badge.

Since I haven't got a real debug probe, I decided to use a raspberry pi pico for this purpose. 

Below I describe steps for anyone to reproduce my approach, that happens to be the quickest and most affordable solution among the currently existing. 

I'm not going to cover a whole process of how I came to the solution, just simple steps to reproduce the result.

If you are interested in more complex uses including wireles communications via zigbee, please check this https://github.com/OpenEPaperLink/OpenEPaperLink

### STEP 1 - setup the pico-probe

It is a quite straigth forward step: 

- go to https://github.com/raspberrypi/debugprobe/releases/tag/debugprobe-v2.2.1 

- download the uf2 file

- flash it to your raspberry pi pico

Make sure you have probe-rs installed: https://probe.rs/

### STEP 2 - connect the tag to the pico probe, to use the pico as a flasher

- Since the tag has no usb, we need to use debug pins ^_^ I highlighted pins, we will use, in red on an img below.

 ![IMG_9923](https://github.com/user-attachments/assets/6adb3dc1-a590-4757-b081-1e1d1ae6b639)

Pinout:

| TAG  | PICO |

|---|---|

| VCC  | 36 |

| GND  |  3 |

| CLK  |  4 |

| DIO  |  5 |

![IMG_9926](https://github.com/user-attachments/assets/c22cc305-3b42-465e-9f10-ac8be615e70d)

- Since there is only 4 pins, you can simply glue them to get a kinda connector, or solder if you are comfortable with it.

### STEP 3 - flash example code

- clone this repo 

- `cargo build --release`

- connect the pico probe to debug pins of the tag

- `probe-rs download --chip nRF52811_xxAA target/thumbv7em-none-eabi/release/nrf52811-solum-tag`

- keep connected till a code is flashed (like 2 secs)

![IMG_9924](https://github.com/user-attachments/assets/a9bfbc6d-d773-4733-a7a0-96552e507f38)

 ## Demo To-Do

 

 - [x] Display text;

 - [x] Display image (bmp);

 - [ ] Activate 3 Leds;

 - [ ] Enable wireless update;