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*There are two ways to configure AIO for binding:*
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1. Connect HDZero AIO15 to PC via micro-USB. Open Betaflight and connect to the AIO15. Navigate to the “Receiver” tab and click “Bind” to initiate binding mode; or
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2. Power off the HDZero AIO15.
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Power-cycle the HDZero AIO15 3 times.
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- Supply power to the HDZero AIO15.
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- The ELRS LED lights up.
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- Turn it off within 2 seconds.
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- Repeat 2 more times.
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Once RX is in binding mode, insert the ELRS TX module into your OpenTX Radio transmitter, select External RF mode and set it to the CRSF protocol. You will find the ELRS menu in the Radio system (ensure the ELRS.LUA file is copied to the SD-Card tools first). Enter the ELRS menu and press [Bind]. The RX LED on the flight controller will become solid if the binding is successful.
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::: tip
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NOTE: Make sure you use the matching ELRS preset for your link rate, failure to do so can lead to un-commanded movement in turns.
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:::
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## ELRS LED status:
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-**Solid** means bind successful or Connection established;
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-**Double-flash** means in bind mode;
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-**Flash slowly** means no signal established with the TX module
- Download and install the [Betaflight Configurator](https://github.com/betaflight/betaflight-configurator/releases/tag/10.10.0).
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- Launch the Betaflight Configurator to flash firmware.
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<imgsrc="/aio15media/image6.png"id="image6">
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1. Select the target port
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2. Click "Update Firmware" to enter Firmware Flasher tab
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3. Select target "HDZero_AIO15" and version, The factory version is 4.4.2[01-Jun-2023]
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4. Click "Load Firmware[Online] " to download the firmware
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5. Click "Flash Firmware" to Flash the Flight controller
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## BlueJay ESC firmware
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<imgsrc="/aio15media/image7.png"id="image7">
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The factory firmware: Z_H_30_48_v0.19.2.HEX. To flash a new ESC firmware, here is [a Youtube tutorial](https://www.youtube.com/watch?v=yEDhnBUFQNI).
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After flashing firmware, it is needed to set the Startup Power of each ESC to 1.00 through [BLHeliSuite 16.7.14.9.0.3]https://github.com/4712/BLHeliSuite/releases/tag/16714903
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Please note that heat dissipation and full charged battery are needed for flashing ESC firmware.
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## HDZero firmware
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- Purchase [HDZero VTX Programmer](https://www.hd-zero.com/product-page/hdzero-vtx-programmer) if you don’t have one;
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- Download HDZero Programmer application from https://www.hd-zero.com/document
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<imgsrc="/aio15media/image8.png"id="image8">
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- Plug the HDZero VTX Programmer into AIO15's VTX FW Connector. And use the USBC cable to connect the programmer tool and PC
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- Launch the HDZeroProgrammer.exe on a Windows PC
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1. Select the AIO15
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2. Click "Load Online Firmware" and select the version number
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3. Click "Flash VTX". "Connecting VTX ..." will be displayed at the bottom
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<imgsrc="/aio15media/image9.jpeg"id="image9">
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<imgsrc="/aio15media/image10.png"id="image10">
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The application will automatically download the firmware and flash it.
A line antenna (¼ wavelength) for the ELRS receiver is pre-soldered and positioned close to the board for low-profile and easy packaging. However, the ELRS antenna needs to be lifted to maintain at least 3 mm of clearance from the board.
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<imgsrc="/aio15media/image4.png"id="image4">
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### VTX antenna
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The HDZero VTX integrated into the AIO5 has a specific requirement to prevent video noise caused by the video RF signal being routed back to the onboard power amplifier.
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The VTX antenna should be mounted outward, not inward, on the board.
HDZero AIO15 is the world’s first digital video AIO, enabling bind and fly 80mm whoops to weigh less than 33.4g. AIO15 integrates a G4 based flight controller, HDZero 5.8GHz digital video transmitter, Serial 2.4GHz ExpressLRS 3.0 receiver, BlueJay 4-in-1 15Ax4 ESC, and a 5V/1A BEC. It is ideal for tiny whoop freestyle.
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It is available at major FPV resellers worldwide, and also at Happymodel and HDZero official online shops.
*There are two ways to bind the receiver, as shown below:*
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1. Button Binding
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Put the receiver into bind mode using any of these procedures:
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- "Bind" button in the Betaflight Configurator, Receiver Page (if can't be found, update the Betaflight firmware).
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- Using the CLI, type in bind rx and press enter once.
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- Using the CLI, type in set expresslrs uid = 0, press enter once, then save and reboot
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Once the SPI receiver is in binding mode (the ELRS LED will start to blink faster), insert the ELRS TX module into your OpenTX Radio transmitter, select External RF mode and set it to the CRSF protocol. You will find the ELRS menu in the Radio system (ensure the ELRS.LUA file is copied to the SD-Card tools first). Enter the ELRS menu and press [Bind]. The RX LED on the flight controller will become solid if the binding is successful.
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2. Binding Phrase
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As of Betaflight 4.4 (with Betaflight Configurator version 10.9.0 or newer), your ExpressLRS Binding Phrase can be set directly on the receiver tab in Betaflight Configurator.
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<imgsrc="/aio5media/image11.png"id="image1">
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Proper configuration of the Betaflight Receiver tab for ExpressLRS SPI Receivers. Receiver Mode
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(1) should be set to SPI RX. SPI Bus Receiver Provider
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(2) should be set to EXPRESSLRS. Enter your binding phrase in the box
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(3) and it will be converted to UID bytes
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(4) and saved to your Betaflight config. You can also take this opportunity to enable Telemetry
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(5) if desired, and make sure RSSI_ADC
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(6) and RSSI Channel
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(7) are disabled as shown.
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::: warning
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SPI ELRS receivers DO NOT support D(D250, D500), F(F500, F1000) and Full Res(100Hz Full Res, 333Hz Full Res) Modes (Packet Rates) and thus will not bind or sync with a TX module in any of these modes.
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**These are the packet rates that will work: 50Hz, 150Hz, 250Hz, 500Hz.**
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:::
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## ELRS LED status
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* Solid means bind successful or Connection established;
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* Faster Blink (500ms) means in bind mode;
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* Slowly Blink (1s) means no signal established with the TX module
3. Hold BOOT button and Power on via USB into PC, then release BOOT button
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4. Install all STM32 drivers and Zadig if required (see [USB Flashing](https://betaflight.com/docs/wiki/guides/current/installing-betaflight) section of Betaflight manual)
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5. Close Betaflight configurator, Restart Betaflight configurator
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6. Click "Update Firmware" to enter Firmware Flasher tab
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7. Select target "CRAZYBEEF4SX1280" and version, The factory version is 4.4.2[01-Jun-2023]
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8. Click "Load Firmware [Online] " to download the firmware
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9. Click "Flash Firmware" to Flash the Flight controller
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## Execute CLI
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Download the file from Flight Configurator tab at https://www.hd-zero.com/document, and unzip HDZEROAIO5_RevXYZ.zip into a temporary directory, i.e. c:\123;
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<imgsrc="/aio5media/image13.png">
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<imgsrc="/aio5media/image14.png">
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1. Switch to CLI tab
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2. Click “Load from file”, and
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- select file c:\123\BTFL_CLI_HDZERO AIO5_1R2.txt for HDZero AIO5 1R2(with BMI270)
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- select file c:\123\BTFL_CLI_HDZERO AIO5_1R3.txt for HDZero AIO5 1R3(with ICM42688P)
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*Notes：Check your HDZero AIO5 version here:*
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<imgsrc="/aio5media/image15.png"id="image13">
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3. Click “Execute”
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<imgsrc="/aio5media/image16.png"id="image14">
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## BlueJay ESC firmware
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The factory firmware: O_H_5_48_V0.19.2.HEX. To flash a new ESC firmware, here is [a YouTube tutorial](https://www.youtube.com/watch?v=yEDhnBUFQNI).
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<imgsrc="/aio5media/image17.png"id="image15">
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::: tip
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Notes:
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- Before flashing ESC firmware, the Radio needs to be turned off to disconnect the ELRS.
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- After flashing firmware, it is needed to set the Startup Power of each ESC to 1100 for Minimum and 1200 for Maximum through https://esc-configurator.com/
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Please note that heat dissipation and full charged battery are needed for flashing ESC firmware.
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:::
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## HDZero firmware
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* Purchase [HDZero VTX Programmer](https://www.hd-zero.com/product-page/hdzero-vtx-programmer) if you don’t have one;
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* Download HDZero Programmer application from https://www.hd-zero.com/document
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<imgsrc="/aio5media/image18.png"id="image16">
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* Plug the HDZero VTX Programmer into AIO5's VTX FW Connector. And use the USBC cable to connect the programmer tool and PC
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* Launch the HDZeroProgrammer.exe on a Windows PC
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1. Select the AIO5
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2. Click "Load Online Firmware" and select the version number
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3. Click "Flash VTX". "Connecting VTX ..." will be displayed at the bottom
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