The Express LRS Handset project is first and foremost an experimental test bed for pushing the envelope with what can be done with the ELRS radio link

HI， I made a handset, how to work with my (targets=DIY_2400_RX_ESP8285_SX1280_via_UART) receiver connection ？ Edit platformio.ini -D MY_UID=0x17,0x13,0x31,0x19,0x23,0xEB ?

Hi, can you please make it clear if it possible to get the rest telemetry data from FC. Why "TLMheader" is always 0x01? I guess that would be 0x14 for link statistics and 0x02, 0x08, 0x21 for gps, battery and flight mode respectively. Is it ELRS version limitation?

Just for the record and guess issue should be closed. My hardware filtering board with uPC324G didn't work properly. So I took rail-to-rail MC33204 and there are no troubles with low input.

Since the output of the hall sensors doesn't cover the full range of the ADC we need to sample at a higher resolution than the OTA if we want to have all the possible steps. This is easily done by reducing the output shift of the hardware oversampling.

Tested with ELRS V1.0.0 using DIY_2400_RX_ESP8285_SX1280_via_UART. No changes were required compared to the RC3 compatibility code, so this is a documentation change only.

Adjusts the power of the TX based on RSSI and LQ from telemetry packets. When using dynamic power the power level set on the radio is treated as the maximum to be used, and the actual power will be reduced from that according to the signal strength at the receiver.

Enable by adding #define USE_DYNAMIC_POWER to user_config.h

The thresholds and filter speed are set via #defines in main.cpp

DYN_POWER_INCREASE_MARGIN - relative to the rsSensitivity of the current packet rate mode DYN_POWER_DECREASE_MARGIN - relative to the above threshold DYN_POWER_LQ_THRESHOLD - LQ below which power will be gradually increased DYN_POWER_LQ_PANIC_THRESHOLD - LQ below which power will be set directly to configured max DYN_POWER_MISSED_TELEM_PACKET_THRESHOLD - The number of consecutive missed telemetry packets that will trigger a transition to the configured max power DYN_POWER_RSSI_FILTER_CUTOFF_HZ - The filter cuttoff frequency for smoothing the RSSI values. Smaller values will produce a slower response when reducing power. Increases in power happen immediately.

Adjusts the power of the TX based on RSSI and LQ from telemetry packets. When using dynamic power the power level set on the radio is treated as the maximum to be used, and the actual power will be reduced from that according to the signal strength at the receiver.

Enable by adding #define USE_DYNAMIC_POWER to user_config.h

The thresholds and filter speed are set via #defines in main.cpp

DYN_POWER_INCREASE_MARGIN - relative to the rsSensitivity of the current packet rate mode DYN_POWER_DECREASE_MARGIN - relative to the above threshold DYN_POWER_LQ_THRESHOLD - LQ below which power will be gradually increased DYN_POWER_LQ_PANIC_THRESHOLD - LQ below which power will be set directly to configured max DYN_POWER_MISSED_TELEM_PACKET_THRESHOLD - The number of consecutive missed telemetry packets that will trigger a transition to the configured max power DYN_POWER_RSSI_FILTER_CUTOFF_HZ - The filter cuttoff frequency for smoothing the RSSI values. Smaller values will produce a slower response when reducing power. Increases in power happen immediately.

Introduces a filter for rssi dBm from telemetry packets and a pair of thresholds for triggering power increase and decrease. Currently the thresholds are hardcoded defines in main.cpp but could usefully be based on the estimated sensitivity for the current packet mode and/or be made user configurable.

This change moves the settings that are most likely to be changed for each user/handset into user_config.h which is not under version control. An example is provided as user_config_template.txt which the user should copy to user_config.h and edit for their own preferences and hardware. This way, when updating firmware by pulling from git the user config won't get overwritten.

In the Settings display, changed the indicator for sync to be more explicit, either sync Always or sync Disarm. Added reminder text to the bottom of the display for long press to save.

When the rx uses lock-on-first it is impossible to change packet rate without power cycling the rx. To fix this we can send a sync packet with the new packet rate before changing the rate on the tx. Since we might lose the packet OTA we set a 'spam' counter to send multiple sync packets before making the change.