update readme

README.md

@@ -2,13 +2,13 @@
 OpenSandbot is an open-source robotic kinetic art table. It has four components: parts, hardware, firmware, and app.
 
 ### Firmware
-This firmware is written in rust for the $4 Raspberry Pi Pico and provides a UART API on [UART0](https://pico.pinout.xyz/) to control the sandbot.
+This firmware is written in rust for the $4 Raspberry Pi Pico (RP2040) and provides a UART API on [UART0](https://pico.pinout.xyz/) to control the sandbot.
 
 ### API
-The API expects messages to be formatted as `METHOD[ ARG0][ ARG1]\n`. All messages (rx and tx) expect the new line character (`\n`) to signal the end of message.
+The API expects messages to be formatted as `METHOD[ ARG0][ ARG1]\n`. All messages (rx and tx) expect the new line character (`\n`) at the end of each message.
 
-- Movement: Ex.  `MOVE 1.2 0.5` would move to theta 1.2 rho 0.5.
+- Movement: Ex. `MOVE 1.2 0.5` would move to theta 1.2 rho 0.5.
 
 The API also emits the status messages
-- `STATUS IDLE`: the sandbot is not currently moving
-- `STATUS MOVING` the sandbot is currently moving to a target position. You may still queue more coordinates at this time.
+- `STATUS IDLE`: the sandbot is idle and not currently moving
+- `STATUS MOVING` the sandbot is currently moving to a target position