third commit

README.md

@@ -1,10 +1,44 @@
 # BallonSonde Project 2023
 This aim to group all ressources to create the PoC
 
-## Requirements
+## Hardware requirements
    * GNU/Linux Debian 
    * a RaspberryPi Zero 1.3 with nothing more (no WiFi, no BT)
 
+## Software requirement
+
+For the RaspberryPi
+```
+apt update
+apt upgrade
+apt install bpython3 python3-venv python3-serial supervisor libopenjp2-7 screen
+
+# in user mode, setup PySSTV to convert pictures in wav mode
+cd ~
+mkdir PySSTV
+python3 -m venv PySSTV/
+cd PySSTV/
+source bin/activate
+pip install pysstv
+```
+## Specs to do
+### Get the default shell
+
+Should have a Serial interface on GPIO14(UART0_TXD) and GPIO15(UART0_RXD).
+I'm using a cheat FTDI232, from anywhere.
+
+### Enable secondary UART port
+
+Should add this config parameters to `/boot/config.txt` :
+```
+dtoverlay=disable-bt
+dtoverlay=uart1,txd1_pin=32,rxd1_pin=33
+force_turbo=1
+enable_uart=1
+```
+
+Now we can use GPIO12 and GPIO13 for a secondary serial port
+
 ## Usages
 
 ### chroot-to-pi.sh script

chroot-to-pi.sh

@@ -36,7 +36,7 @@
 # so it's better just to let the pi resize the partitions
 
 # check if package is not installed
-if [ $(dpkg-query -W -f='${Status}' qemu-user-static 2>/dev/null | grep -c "ok installed") -eq 0 ];
+#if [ $(dpkg-query -W -f='${Status}' qemu-user-static 2>/dev/null | grep -c "ok installed") -eq 0 ];
 
 mkdir -p /mnt/raspbian