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faq.md: update OTA firmware instructions 

added ESP32 OTA firmware update instructions
added nRF OTA firmware update instructions to use the new nRF DFU app on android and iOS
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uncle lit 1 year ago
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@ -65,7 +65,8 @@ author: https://github.com/LitBomb<!-- omit from toc -->
- [6.4. Q: I can't connect via Bluetooth, what is the Bluetooth pairing code?](#64-q-i-cant-connect-via-bluetooth-what-is-the-bluetooth-pairing-code)
- [6.5. Q: My Heltec V3 keeps disconnecting from my smartphone. It can't hold a solid Bluetooth connection.](#65-q-my-heltec-v3-keeps-disconnecting-from-my-smartphone--it-cant-hold-a-solid-bluetooth-connection)
- [7. Other Questions:](#7-other-questions)
- [7.1. Q: How to Update repeater and room server firmware over the air?](#71-q-how-to--update-repeater-and-room-server-firmware-over-the-air)
- [7.2 Q: How to update ESP32-based devices over the air?](#72-q-how-to-update-esp32-based-devices-over-the-air)
- [7.1 Q: How to update nRF (RAK, T114, Seed XIAO) repeater and room server firmware over the air using the new simpler DFU app?](#71-q-how-to-update-nrf-rak-t114-seed-xiao-repeater-and-room-server-firmware-over-the-air-using-the-new-simpler-dfu-app)
## 1. Introduction
@ -534,74 +535,35 @@ You can get the epoch time on <https://www.epochconverter.com/> and use it to se
---
## 7. Other Questions:
### 7.1. Q: How to Update repeater and room server firmware over the air?
**A:** Only nRF-based RAK4631 and Heltec T114 OTA firmware update are verified using nRF smartphone app. Lilygo T-Echo doesn't work currently.
You can update repeater and room server firmware with a Bluetooth connection between your smartphone and your LoRa radio using the nRF app.
### 7.2 Q: How to update ESP32-based devices over the air?
1. Download the ZIP file for the specific node from the web flasher to your smartphone
2. On the phone client, log on to the repeater as administrator (default password is `password`) to issue the `start ota`command to the repeater or room server to get the device into OTA DFU mode
![image](https://github.com/user-attachments/assets/889bb81b-7214-4a1c-955a-396b5a05d8ad)
**A:** For ESP32-based devices (e.g. Heltec V3):
1. On flasher.meshcore.co.uk, download the **non-merged** version of the firmware for your ESP32 device (e.g. `Heltec_v3_repeater-v1.6.2-4449fd3.bin`, no `"merged"` in the file name)
2. From the MeshCore app, login remotely to the repeater you want to update with admin priviledge
4. Go to the Command Line tab, type `start ota` and hit enter.
5. you should see `OK` to confirm the repeater device is now in OTA mode
6. The command `start ota` on an ESP32-based device starts a wifi hotspot named `MeshCore OTA`
7. From your phone or computer connect to the 'MeshCore OTA' hotspot
8. From a browser, go to http://192.168.4.1/update and upload the non-merged bin from the flasher
1. `start ota` can be initiated from USB serial console on the web flasher page or a T-Deck
4. On the smartphone, download and run the nRF app and scan for Bluetooth devices
5. Connect to the repeater/room server node you want to update
1. nRF app is available on both Android and iOS
**Android continues after the iOS section:**
### 7.1 Q: How to update nRF (RAK, T114, Seed XIAO) repeater and room server firmware over the air using the new simpler DFU app?
**iOS continues here:**
5. Once connected successfully, a `DFU` icon ![Pasted image 20250309173039](https://github.com/user-attachments/assets/af7a9f78-8739-4946-b734-02bade9c8e71)
appears in the top right corner of the app
![Pasted image 20250309171919](https://github.com/user-attachments/assets/08007ec8-4924-49c1-989f-ca2611e78793)
**A:** The steps below work on both Android and iOS as nRF has made both apps' user interface the same on both platforms:
6. Scroll down to change the `PRN(s)` number:
![Pasted image 20250309190158](https://github.com/user-attachments/assets/11f69cdd-12f3-4696-a6fc-14a78c85fe32)
- For the T114, change the number of packets `(PRN(s)` to 8
- For RAK, it can be 10, but it also works on 8.
7. Click the `DFU` icon ![Pasted image 20250309173039](https://github.com/user-attachments/assets/af7a9f78-8739-4946-b734-02bade9c8e71), select the type of file to upload (choose ZIP), then select the ZIP file that was downloaded earlier from the web flasher
8. The upload process will start now. If everything goes well, the node resets and is flashed successfully.
![Pasted image 20250309190342](https://github.com/user-attachments/assets/a60e25d0-33b8-46cf-af90-20a7d8ac2adb)
**Android steps continues below:**
1. on the top left corner of the nRF Connect app on Android, tap the 3-bar hamburger menu, then `Settings`, then `nRF5 DFU Options`
![Android nRF Hamberger](https://github.com/user-attachments/assets/ea6dfeef-9367-4830-bd70-1441d517c706)
![Android nRF Settings](https://github.com/user-attachments/assets/c63726bf-cecd-4987-be68-afb6358c7190)
![Android nRF DFU Options](https://github.com/user-attachments/assets/b20e872f-5122-41d9-90df-0215cff5fbc9)
2. Change `Number of packets` to `10` for RAK, `8` for Heltec T114
![Android nRF Number of Packets](https://github.com/user-attachments/assets/c092adaf-4cb3-460b-b7ef-8d7f450d602b)
3. Go back to the main screen
4. Your LoRa device should already ben in DFU mode from previous steps
5. tap `SCANNER` and then `SCAN` to find the device you want to update, tap `CONNECT`
![Android nRF Scanner Scan Connect](https://github.com/user-attachments/assets/37218717-f167-48b6-a6ca-93d132ef77ca)
6. On the top left corner of the nRF Connect app, tap the `DFU` icon next to the three dots
![Android nRF DFU](https://github.com/user-attachments/assets/1ec3b818-bf0c-461f-8fdf-37c41a63cafa)
7. Choose `Distribution packet (ZIP)` and then `OK`
![Android nRF Distribution Packet (ZIP)](https://github.com/user-attachments/assets/e65f5616-9793-44f5-95c0-a3eb15aa7152)
8. Choose the firmware file in ZIP formate that you downloaded earlier from the MeshCore web flasher, update will start as soon as you tap the file
![Android nRF FW Updating](https://github.com/user-attachments/assets/0814d123-85ce-4c87-90a7-e1a25dc71900)
9. When the update process is done, the device will disconnect from nRF app and the LoRa device is updated
1. Download nRF's DFU app from iOS App Store or Android's Play Store, you can find the app by searching for `nrf dfu`, the app's full name is `nRF Device Firmware Update`
2. On flasher.meshcore.co.uk, download the **ZIP** version of the firmware for your nRF device (e.g. RAK or Heltec T114 or Seeed Studio's Xiao)
3. From the MeshCore app, login remotely to the repeater you want to update with admin priviledge
4. Go to the Command Line tab, type `start ota` and hit enter.
5. you should see `OK` to confirm the repeater device is now in OTA mode
6. Run the DFU app,tab `Settings` on the top right corner
7. Enable `Packets receipt notifications` and change `Number of Packets` to 10 for RAK, 8 for T114. 8 also works for RAK.
8. Select the firmware zip file you downloaded
9. Select the device you want to update. If the device you want to updat is not on the list, try enabling`OTA` on the device again
10. Tab the `Upload` to begin OTA update
11. If it fails, try turning off and on Bluetooth on your phone. If that doesn't work, try rebooting your phone.
12. Wait for the update to complete. It can take a few minutes.
---

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