update docs

README.md

@@ -10,3 +10,20 @@ view](./docs/4-strain_bb.jpg)
 
 ![Two single strain half bridges togerher breadboard
 schematic](./docs/4-strain_schem.jpg)
+
+## Bottom side
+
+The bottom side for testing looked like this initially:
+![The bottom side of the weighting platform](./docs/bottom.jpg)
+
+## Commands
+
+Load the code into the Arduino Pro Micro 3.3V:
+
+```
+pio run -t upload
+```
+
+## License
+
+MIT