added pyRF24 build instructions from mslookup

tools/rpi/README.md

@@ -16,7 +16,6 @@ Thanks go to all who contributed, and are continuing to contribute,
 by providing their time, equipment, and ingenuity!
 
 
-
 Required Hardware Setup
 -----------------------
 
@@ -26,11 +25,61 @@ Required Hardware Setup
 - NRF24L01+ Radio Module connected as described, e.g., in [2]
   (Instructions at [3] should work identically, but [2] has more
   pretty pictures.)
-- TMRh20's 'Optimized High Speed nRF24L01+ Driver' [3], installed
+- TMRh20's 'Optimized High Speed nRF24L01+ Driver' [3], installed 
   as per the instructions given in [4]
   - Python Library Wrapper, as per [5]
 
 
+Building the NRF24 Python Wrapper
+---------------------------------
+
+You have to install the NRF24 Python Library, as a Dependency for the Raspberry Pi Version of Ahoy.
+
+To do that correctly, I have contacted the developer of NRF24 via github
+[Python 3 Wrapper not installing properly #845](https://github.com/nRF24/RF24/issues/845) 
+as I could not get the Python Wrapper for NRF24 to be built.
+
+- Install Raspberry Pi OS lite x86 with raspberry pi imager
+- Connect nrf24 module to raspberry pi (as described in github)
+- Login with user pi
+- Execute `sudo apt update && sudo apt -y upgrade`
+- Execute `sudo raspi-config` and
+  - Select "Expand filesystem" in "Advanced Options"
+  - Activate "SPI" in "Interface Options"
+  - "Finish" to exit `raspi-config` Tool, reboot YES!
+- Login as pi user again
+
+```code
+sudo apt install cmake git python3-dev libboost-python-dev python3-pip python3-rpi.gpio
+
+sudo ln -s $(ls /usr/lib/$(ls /usr/lib/gcc | \
+     tail -1)/libboost_python3*.so | \
+     tail -1) /usr/lib/$(ls /usr/lib/gcc | \
+     tail -1)/libboost_python3.so
+
+git clone https://github.com/nRF24/RF24.git
+cd RF24
+
+export RF24_DRIVER=SPIDEV
+rm Makefile.inc #just to make sure there is no old stuff
+mkdir build && cd build
+cmake ..
+make
+sudo make install
+
+cd ../pyRF24
+rm -r ./build/ ./dist/ ./RF24.egg-info/ ./__pycache__/ #just to make sure there is no old stuff
+python3 -m pip install --upgrade pip
+python3 -m pip install .
+python3 -m pip list #watch for RF24 module - if its there its installed
+
+cd ..
+cd examples_linux/
+python3 getting_started.py # to test and see whether RF24 class can be loaded as module in python correctly
+```
+
+If there are no error messages on the last step, then the NRF24 Wrapper has been installed successfully.
+
 
 Example Run
 -----------
@@ -81,7 +130,7 @@ This can be used to inject debug payloads
 The message must be in hexlified format
 
 Use of variables:
-  * tttttttt expands to current time like we know from our `80 0b` command
+  * `tttttttt` expands to current time like we know from our `80 0b` command
 
 Example injects exactly the same as we normally use to poll data
 
@@ -139,4 +188,3 @@ References
 - [3] https://nrf24.github.io/RF24/index.html
 - [4] https://nrf24.github.io/RF24/md_docs_linux_install.html
 - [5] https://nrf24.github.io/RF24/md_docs_python_wrapper.html
-