Add wifi qrcode script and instructions

.gitignore

@@ -10,3 +10,6 @@ bin/*
 
 #ignore config file
 src/config.hpp
+
+#ignore wifi image
+img/wifi.png

Makefile

@@ -39,6 +39,9 @@ DEFINITIONS  = -DDATA_='"$(DATA)"'
 DEFINITIONS += -DDATA_IMG_='"$(DATA_IMG)"'
 DEFINITIONS += -DDATA_FONT_='"$(DATA_FONT)"'
 
+WIFI_SSID = "DEFAULT_WIFI"
+WIFI_PASS = "DEFAULT_PASS"
+
 all : $(OBJ)
 	@echo LD $@
 	@$(CC) $(FLAGS) $(CFLAGS) -o $(BIN)/$(TARGET) $(OBJ) $(LIBRARIES)
@@ -50,10 +53,13 @@ all : $(OBJ)
 src/config.hpp :
 	cp src/config.def.hpp src/config.hpp
 
+img/wifi.png : 
+	./scripts/wifi.sh $(WIFI_SSID) $(WIFI_PASS)
+
 open : all
 	$(BIN)/$(TARGET)
 
-$(OBJ): src/config.hpp
+$(OBJ): src/config.hpp img/wifi.png
 
 install : all
 	mkdir -p $(PREFIX)/bin
@@ -73,5 +79,8 @@ clean :
 	find . -type f -name '*.o' -delete
 	rm -rf $(BIN)/*
 
+clean-wifi:
+	rm -f ./img/wifi.png
+
 clean-config :
 	rm -rf src/config.hpp

README.md

@@ -9,6 +9,7 @@ Features/TODO
 
 - Write straight to framebuffer (sdl2) (DONE)
 - Display Weather rss feed (DONE)
+- Display Wifi qrcode (DONE)
 - Display camera feed
 - Display who is home
 - Display network speed
@@ -70,3 +71,17 @@ To install:
 To uninstall:
 
 `make uninstall`
+
+Wifi
+----
+
+The makefile by default will call a script that will generate a wifi qr code
+for you. You can add your SSID and password by editing the `WIFI_SSID` and
+`WIFI_PASS` variables in the make file, or by calling the script yourself in
+`./scripts`. You can cleanup the wifi image at any time by calling 
+`make clean-wifi`. Next time the executable is built it will regenerate the
+image.
+
+The qr code generation relies on the program `qrencode`. It can be installed on
+any debian system using `sudo apt install qrencode`
+

scripts/.gitignore

@@ -0,0 +1 @@
+*.png

scripts/wifi.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+if [ $# -ne 2 ]; then
+    echo "Format:"
+    echo "./wifi.sh <SSID> <PASSWORD>"
+    echo "The result will be in wifi.png"
+fi
+
+qrencode -s 6 -o "./img/wifi.png" "WIFI:T:WPA;S:$1;P:$2;;"
+
+echo "Your wifi qrcode is wifi.png !"
+echo "Your wifi qrcode is now in the local img folder as wifi.png"