HappyModel Speki+ Micro 2.4G receiver

Speki+ is the upgrade DSM2/DSMX/SRXL protocol compatible Micro 2.4Ghz receiver, it comes with PA module, longer range and stable signal transmission, with RSSI telemetry. You can get the RSSI from Betaflight OSD

Specifications:
Brand: Happymodel
Model Name: Speki+
Weight: 1.2g
Dimension: 20mm*12.4mm*5mm
Support protocol: DSM2/DSMX
Output Signal configuration: SRXL(Set Spektrum2048/SRXL for the serial receiver provider)
Antenna connector: I-PEX MHF3
Antenna length: 70mm
Input voltage: 3.6v~13v
Input current: 100ma
Channels: Max12ch(usually channel 12 is used for RSSI)
Telemetry output:
For the radio transmitter which come with Opentx and equipped with DSM2/DSMX module, the RSSI display as the value of Hold from the radio screen. And the input voltage is display as the value of A2 .
Sensitivity: -101dBm
Output Power(telemetry): 18dBm

Bind procedure:

• Press and hold the bind button of the receiver, then power on for the Speki+ receiver.(Usually we can connect the receiver to the flight controller, and plug the usb to power up for the receiver)
• The Red LED start to blinking fast, this indicate the receiver is in bind mode
• Make your radio transmitter get into bind mode. If the red LED on the receiver turned off ,this indicate bind is successful then quit bind mode for the radio transmitter
• The red LED on the Speki+ receiver is solid , now the radio transmitter and the receiver are working fine.

Notes:
Make sure the “Telemetry” was enable from the Betaflight Configurator, otherwise the receiver will not work.
Please set AUX8 for the RSSI Channel
The receiver signal should be connected to idle port and enable Serial_rx for this UART port. If you connect to TX1 then you should enable serial_rx for UART1.