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HOLYIOT-21017-nRF52840-USB

Manual

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The following figure shows the block diagram of the development and use of

Holyiot-21017.

Holyiot-21017 control diagram

among them:

①: Developers can import the files to be upgraded into "nRF-Connect".

②: Developers can use "Holyiot-21017" as a USB device with Bluetooth host

function to interact with "nRF-Connect".

③: "Holyiot-21017" as a Bluetooth host can display the received data of other

Bluetooth devices on "nRF-Connect" via USB.

④: "nRF-Connect" can upload and issue commands to "Holyiot-21017" via

USB to realize the visual operation of Bluetooth data exchange with other

Bluetooth slaves. "nRF-Connect" can also quickly upgrade the firmware of

"Holyiot-21017" via USB without other emulators.

⑤: Developers can implement the "Holyiot-21017" hardware reset operation by

approaching the magnet.

⑥: Reserved.

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Summary of content (8 pages)

PAGE 1
HOLYIOT-21017-nRF52840-USB Manual /*************************************************************************/ The following figure shows the block diagram of the development and use of Holyiot-21017. Holyiot-21017 control diagram among them: ①: Developers can import the files to be upgraded into "nRF-Connect". ②: Developers can use "Holyiot-21017" as a USB device with Bluetooth host function to interact with "nRF-Connect".
PAGE 2
1. The normal use of Holyiot-21017: we will explain in detail the normal use of "Holyiot-21017" as a USB device with Bluetooth host function. Developers need to download and correctly install the newer Nordic official PC version software, "nRF-Connect", the link is as follows: https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRFConnect-for-desktop.
PAGE 3
Then there will be a pop-up prompt to upgrade to the official default firmware of no signal enhancement function, we choose "NO", (of course, if you choose "YES", the operation will fail and the previous interface will be restored): Whether to upgrade to the official default firmware After waiting for a few seconds, the following operation interface will be entered: Enter the visual operation interface of the Bluetooth host Next, developers can operate "Holyiot-21017" according to their needs: Operate
PAGE 4
First, insert "Holyiot-21017" into the computer through the USB port. After the computer recognizes the USB device normally, reset the "Holyiot-21017" hardware by approaching the magnet. If the reset is successful, the red indicator light of "Holyiot-21017" will be the breathing effect. After the reset is successful, the magnet needs to be moved a little farther (>0.3m) to avoid continuous resetting.
PAGE 5
Choose a USB device that can be upgraded with firmware Click "Auto read memory", you can see the firmware stack information of "Holyiot-21017": You can read the current MCU firmware stack information Then click "Add HEX file" to load the firmware to be upgraded:
PAGE 6
(Note that this upgrade can only upgrade application and softdevice) Load the firmware to be upgraded If the developer wants to stop the firmware upgrade at this time, you can directly click "Reset" to reset to the normal working state.
PAGE 7
Firmware upgrade (USB-DFU) successful After the firmware upgrade is successful, "Holyiot-21017" will directly run the upgraded firmware program. The above steps can be used to repeatedly upgrade the firmware. At this point, the firmware upgrade demonstration is over.
PAGE 8
FCC Statement This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: 1) this device may not cause harmful interference, and 2) this device must accept any interference received, including interference that may cause undesired operation. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.