I had issues with Bluetooth in the Official Firmware, at a random moment, Bluetooth would no longer activate: if I tried to activate it in settings, the switch would turn ON for a while and then revert back to OFF. This happened to me in version 1.5.
I've had the DAP for a year, and beyond issues with Bluetooth (for example, having to connect Bluetooth repeatedly at many startups until it worked properly), I hadn't experienced anything as 'serious' as Bluetooth not working at all.
During this year, the errors have been:
- The device connects via Bluetooth but there is no sound at all, requiring Bluetooth to be reconnected several times.
- The device doesn't even connect, giving a connection error. The only solution was to restart.
- The device connects but the sound is as if it were high-pitched, especially noticeable in songs with vocals.
Simply updating the Official Firmware was enough to get it working again. I'm not sure if the other errors mentioned earlier have disappeared, but at least now the Bluetooth is working again. I'm leaving here the official updates for the HiFi Walker H2 that I found in case it might be useful to someone else, all them are provided by Hifiwalker itself by Google Drive.
Information that might be relevant for the wiki (or not): Versions 1.1, 1.2, and 1.3 are exclusive to the HiFi Walker H2 that used MicroUSB. Version 1.4 is exclusive to the HiFi Walker H2 that used MicroUSB and utilized a modified power supply circuit (this can be updated to version 1.5 according to some notes, but I'm unsure if it could be updated further).
The HiFi Walker H2 with USB Type-C cannot downgrade to version 1.4, only to version 1.5 or higher.
To check the current version, you need to go to System Settings -> About the Player -> Version.
To update you should rename the chosen file to 'update.upt' and place it in the root directory of the MicroSD card. Then, you need to go to System Settings -> Firmware Update -> YES.
Official Firmware 1.1 (HiFi Walker H2 with MicroUSB):
https://files.catbox.moe/g8f7iv.uptSHA512: 285c5bfa2c8b5fe649e15d27b92ea2af20dc7a983aa8c04da7a750ab511421dd3f7d0c5c6b8783b69b0afc45449e8aa501de68e223036759ebb41332717d0c14
Official Firmware 1.2 (HiFi Walker H2 with MicroUSB):
https://files.catbox.moe/8e5dqm.uptSHA512: 505329d3a51a8aa3f7eb97af43c69f72790b49bb9e967666be094739275e0116218b970dcf31b056a933e61d45c094158d8d6bad48994db31ece8464fe428b0b
Official Firmware 1.3 (HiFi Walker H2 with MicroUSB):
https://files.catbox.moe/cusmlq.uptSHA512: de84bd01a79eced5d8a96fb526e162d140e8e84383ca1c00bc779b17d9e654f5de5c5ea19684c77e0cbef2d219f1935094b42485b6eff2f6f0ce24ca053b68cf
Official Firmware 1.4 (HiFi Walker H2 with MicroUSB with modified power supply circuit):
https://files.catbox.moe/mf2ykm.uptSHA512: 8c0116dd9c52469fca9748a7f5a6d35f7b924a764e10c364b4ad22e818405575f99a65b14df64ba47fab30f69fccff38dadf931bd9879018740b67c1f28bfcb4
Official Firmware 1.5 (HiFi Walker H2 with MicroUSB with modified power supply circuit and HiFi Walker H2 with USB Type-C):
https://files.catbox.moe/7c2llm.uptSHA512: 7ac63a4ce9d19321a77971960a0e7257bbb2a2a6b4f3be445fc2f6be63e4034cf462cb00f67295d6021feb28d46b325f385cdb1fa2e34ec82c2cf28570064b15
Official Firmware 1.6 (HiFi Walker H2 with USB Type-C):
https://files.catbox.moe/cs0ynt.uptSHA512: 10a65dd5b6f9451a447bc470d673621a0ff7fcbf66a46c5842324b8d79afa0cda974eaf02409dbf472c216bffbdf0a807ca5de74426e3b22fa9bc4c6ebc05fc4
Official Firmware 1.7 (HiFi Walker H2 with USB Type-C): not found yet
SHA512:
Official Firmware 1.8 (HiFi Walker H2 with USB Type-C):
https://files.catbox.moe/9te72u.uptSHA512: acf55e89587d7990a3b1ae0cc1fffe995a7cec91624fd8a01bcfc50d50b20ee50cbbd0fd65204fcb531973269351a5788f395860cd87b354c3d51b2fadbfee66
Moreover, with the above information, the pre-patched versions that are missing could be added to the wiki. In the wiki, the pre-patched versions missing are: 1.1, 1.4, 1.6 and 1.8
IMPORTANT: Currently, Hifiwalker doesn't recommend updating to 1.8 unless you are coming directly from 1.7. I tried updating from 1.6 to 1.8 and after a while, I experienced graphical errors in the Official Firmware (inverted colors and inverted letters), fixed by downgrading to 1.6.
I found a Theme Editor Tool (for Microsoft Windows, maybe it works with Wine) and it's also a official firmware decompression tool, maybe it's useful for achieve Bluetooth in Rockbox for HiFi Walker H2? Anyway:
It was found in:
http://www.eroshifi.com/en/download/firmware/31.htmlSpecifically in:
http://www.eroshifi.com/upload/fw/EROS_Q_ThemeTools.zipMirror:
https://files.catbox.moe/1nypw7.zipSHA512: 414854ab44271eb868a776b7f097e603ea88c25c3f6393820c659486639a619e6c59c81826ecede9130bf936837e67407e975523f4013390b35109ed6aaeb66b