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v0.2.2.2 (#830)

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v0.2.2.2 (#830)
This commit is contained in:
MartinNYHC
2026-03-27 09:27:47 +01:00
committed by GitHub
parent 8270030687
commit 67f91d94de
112 changed files with 18595 additions and 9993 deletions
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spoolbuddy/README.md
+11 -30
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@@ -53,18 +53,15 @@ ls /dev/i2c-*
Add the following lines under the `[all]` section:
```
# SpoolBuddy: I2C bus 0 for NAU7802 scale (GPIO0/GPIO1)
dtparam=i2c_vc=on
# SpoolBuddy: I2C bus 1 for NAU7802 scale (GPIO2/GPIO3)
dtparam=i2c_arm=on
# SpoolBuddy: Disable SPI auto CS (manual CS on GPIO23 for PN5180)
dtoverlay=spi0-0cs
```
- `i2c_vc=on` enables I2C bus 0 (GPIO0/GPIO1). The default `i2c_arm` only
enables bus 1 (GPIO2/GPIO3). The NAU7802 is wired to bus 0.
- `spi0-0cs` disables the kernel SPI driver's automatic chip-select. We use
- `i2c_arm=on` enables I2C bus 1 (GPIO2/GPIO3). The NAU7802 is wired to bus 1.
manual CS on GPIO23 because the driver's CS timing doesn't meet the PN5180's
requirements.
Then reboot:
@@ -75,10 +72,10 @@ sudo reboot
Verify after reboot:
```bash
ls /dev/i2c-0
ls /dev/i2c-1
# Should exist
sudo i2cdetect -y 0
sudo i2cdetect -y 1
# Should show 0x2A (NAU7802)
```
@@ -90,9 +87,6 @@ sudo apt install python3-spidev python3-libgpiod gpiod libgpiod3 i2c-tools
- `python3-spidev` / `libgpiod3` — system libraries for SPI and GPIO access
- `gpiod` — command-line GPIO tools (useful for debugging)
- `i2c-tools` — I2C diagnostic tools (`i2cdetect`, `i2cget`, etc.)
#### 4. Install Python dependencies (in venv)
```bash
pip install spidev gpiod smbus2
@@ -100,9 +94,6 @@ pip install spidev gpiod smbus2
- `spidev` — Python SPI bindings (PN5180 NFC reader)
- `gpiod` — Python GPIO bindings via libgpiod (works on both RPi 4 and RPi 5)
- `smbus2` — Python I2C bindings (NAU7802 scale)
#### 5. Solder all connections
Wago connectors or breadboard jumpers are unreliable for SPI — the PN5180
is very sensitive to signal integrity issues (loose connections cause RF
@@ -132,7 +123,7 @@ Place a tag on the reader. Supported tag types:
|---------------------|--------|------------------------------|
| MIFARE Classic 1K | `0x08` | Bambu Lab filament tags |
| MIFARE Classic 4K | `0x18` | Bambu Lab filament tags |
| NTAG (213/215/216) | `0x00` | SpoolEase / OpenPrintTag |
| NTAG (213/215/216) | `0x00` / `0x04` | SpoolEase / OpenPrintTag |
### Troubleshooting
@@ -150,34 +141,24 @@ Place a tag on the reader. Supported tag types:
- SPI speed: **500 kHz** (higher speeds cause communication errors)
- SPI mode: **0** (CPOL=0, CPHA=0)
- CS timing: **5µs** setup after CS LOW, **100µs** hold after CS HIGH
- BUSY handshake: wait for BUSY **HIGH** (processing started) then **LOW** (done) — waiting only for LOW is incorrect
- `setTransceiveMode()`: must write `0x03` to SYSTEM_CONFIG bits 0-2 before every `SEND_DATA`, or the PN5180 buffers data but never transmits on RF
- Bambu tags use **MIFARE Classic** with per-sector keys derived via **HKDF-SHA256** from a master key + tag UID
- NTAG reads require **CRC disabled** (unlike MIFARE Classic which needs CRC enabled)
- The PN5180 handles Crypto1 encryption/decryption internally via the `MFC_AUTHENTICATE` (0x0C) host command
---
## NAU7802 Scale (I2C)
### Wiring
| NAU7802 Pin | Raspberry Pi Pin | GPIO | Wire Color |
|-------------|------------------|--------|------------|
| VCC | Pin 1 | — | Red |
| SDA | Pin 27 | GPIO 0 | Yellow |
| SCL | Pin 28 | GPIO 1 | White |
| SDA | Pin 3 | GPIO 2 | Yellow |
| SCL | Pin 5 | GPIO 3 | White |
| GND | Pin 30 | — | Black |
> **I2C Bus:** Uses I2C bus 0 (GPIO0/GPIO1), enabled via `dtparam=i2c_vc=on`
> in config.txt. Bus 1 (GPIO2/GPIO3) is the default but those pins are not
> used here.
> **I2C Bus:** Uses I2C bus 1 (GPIO2/GPIO3), enabled via `dtparam=i2c_arm=on`
> in config.txt.
### Verify
```bash
sudo i2cdetect -y 0
sudo i2cdetect -y 1
# Should show 0x2A
sudo python3 spoolbuddy/scale_diag.py