# RX Testing

## Overview¶

The RX Scoreboard is a developer/troubleshooting feature that shows the outcome of every receiver packet cycle with a single character. Enable it with -DPRINT_RX_SCOREBOARD when compiling any RX environment and connect to the debug serial UART, usually the same as the CRSF output UART for most environments.

⚠️ For that reason, it should not be enabled during normal RC control operations since it will get mixed in with real CRSF data sent to the FC.

## Example 500Hz 1:32 Scoreboard¶

RRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRR_RRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRR._RRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRTRRRRRRRRRRRRRRR_RRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRT
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRR_RRRRRRRRRRRRRRTRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRR__.RRRRRRRRRRRR
RTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRTRRRRRRRRRRRRRRRRRR_RRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRR_RRRRRRRRR.RRTRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRR._RRRRRRRRRRRRRRRRRRTRRRRRRRR.RRRRRRRRRRR
RRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRTRRRRsRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
TRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR.TRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRTRRRRRRRRRRRRRRRRRR_RRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRR_RRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRR._R_RRRRRRRRRRRRRRRRTRRRRRRRR.RRRRRRRRRRRRRR
RRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRTRRRRRR


## Character Legend¶

Character Meaning Description
R Receive ✔️ A valid RC sticks or MSP packet was received which passes all validation
T Telemetry ✔️ Telemetry was successfully transmitted
s SYNC ✔️ A valid SYNC packet was received. Sync packets come about once every 4 seconds, or more frequently around a telemetry ratio or packet rate change
_ Missing ❌ No packet was received at all yet one was expected 👻
. CRC ❌ A packet was received but failed CRC check

## Name Origin¶

The term scoreboard originated from an Apache (web server) feature that would display the state of every work as a single character in a text block. Thanks to them for the feature name and the dodecatillion web pages they've enabled serving.