# MainsailOS install

## Image

Start with MainsailOS from Raspberry Pi Imager install

## Driver update

Run `rpi-upate` to get at least kernel 6.6 and update camera driver

## Configuration files

Copy over configuration files from this repo to `~/printer_data/config/`

## Set up Klipper firmware

Check `~/printer_data/config/printer.cfg`, `[mcu]` section:

```ini
[mcu]
serial: /dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0
baud: 250000
```

`250000` is fastest transfer supported by Ender 3 board.  It needs to match baud setting in `make menuconfig` low-level settings:

```
[*] Enable extra low-level configuration options
    Micro-controller Architecture (Atmega AVR)  --->
    Processor model (atmega1284p)  --->
    Processor speed (16Mhz)  --->
    Communication interface (UART0)  --->
[ ] Compile for simulavr software emulation
(250000) Baud rate for serial port
()  GPIO pins to set at micro-controller startup
```

```bash
cd ~/klipper
make clean
make menuconfig
make
make flash FLASH_DEVICE=/dev/ttyUSB0
```

(seems to work better than `make flash FLASH_DEVICE=/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0`)

Flashing fails sometimes.  Possible workarounds:

- Klipper app is still talking to device?  Shutdown firmware and app first?
- `/dev/ttypUSB0` and `/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0` are links to same device, but one works and other doesn't?
- Try rebooting Pi

## /boot

Copy `config.txt` and `cmdline.txt` from this repo.

## Zabbix agent

```bash
cd
wget https://repo.zabbix.com/zabbix/7.0/raspbian/pool/main/z/zabbix-release/zabbix-release_7.0-1+debian11_all.deb
sudo dpkg -i zabbix-release_7.0-1+debian11_all.deb
sudo apt update
sudo apt install zabbix-agent2
```

Update `/etc/zabbix/zabbix_agent2.conf` from `zabbix/zabbix_agent2.conf` in this repo.

Confirm `/etc/zabbix/*` files are owned by `zabbix:zabbix`.

```bash
sudo systemctl restart zabbix-agent2
sudo systemctl status zabbix-agent2
```