SafeDetect / Mbed OS tx_serial_from_pi

this works for reading in data from pi via usb

Diff: README.md

Revision:
106:681967d62a72
Parent:
105:6979ad8bc0bc
--- a/README.md	Mon Nov 04 16:00:04 2019 +0000
+++ b/README.md	Tue Nov 05 10:00:04 2019 +0000
@@ -38,9 +38,9 @@
 
 Depending on the target, you can build the example project with the `GCC_ARM`, `ARM` or `IAR` toolchain. After installing Arm Mbed CLI, run the command below to determine which toolchain supports your target:
 
-    ```bash
-    $ mbed compile -S
-    ```
+```bash
+$ mbed compile -S
+```
 
 ## Expected output
 The LED on your target turns on and off every 500 milliseconds.