AIGO EROS Q / EROS K

Also sold as:

• AGPTek H3
• HIFI WALKER H2
• Surfans F20

NOTE: The EROS Qii uses a very different internal platform internally, and is *not supported.*

These models are identical except for the case, and except for the AGPTek model, can use each other's firmware updates.

NOTE: Although the hardware appears to be identical, newer Hifiwalker H2 units ship with v1.3 firmware which is not compatible with v1.0-v1.2 firmware (and vice versa).

EROS Q: 90x55x15mm, 152g

EROS K: 94x57x15mm, 111g

Hardware summary

Component	Model	Notes
SoC	X1000	1.0GHz MIPS XBurst with 32MB of SIP LPDDR RAM
PMU	Unknown AXPxxx	I2C PMU
DAC	TI PCM 5102	I2S
NAND	Unknown 1Gb
Display	320x240 2"
Battery	Li-Ion 3.7v 1300mAh

Hardware disassembly was not necessary to complete this hosted port. Other than Bluetooth, all hardware functionality appears to work.

Installation

Rockbox functions very well on these target, and nightly builds are considered stable for day-to-day use.

The RockboxUtility fully supports these players (note that the current 1.4.1 release is from 2019 and will not work). However, if you wish to install the bootloader manually, follow these instructions:

• Build or download the bootloader
• Obtain a stock firmware image
• Patch the firmware image with the bootloader
• Rename the patched firmware file to update.upt and place it into the root directory of the SD card
• Grab the latest daily build for the player and unzip it into the root directory of the SD card
• Go into the settings menu and select firmware update.
• Upon reboot, select rockbox from the initial menu

Here you can download the current bootloader builds, along with "binary patches" that can be easily applied to stock firmware update images using the 'bspatch' utility:

Player	OF version	URL	Notes
AIGO EROS K	1.3	https://download.rockbox.org/bootloader/aigo/erosk.zip
AIGO EROS Q	1.8	https://download.rockbox.org/bootloader/aigo/erosq.zip
AGPTek H3	1.2 (20180905)	https://download.rockbox.org/bootloader/agptek/h3.zip
HIFI WALKER H2	1.2	https://download.rockbox.org/bootloader/hifiwalker/h2.zip	Not compatible with v1.3 players!
HIFI WALKER H2	1.3		Bootloader binary is the same as the v1.2, but Hifiwalker has not released a v1.3 update image so no patch is currently possible
Surfans F20	2.2	https://download.rockbox.org/bootloader/surfans/f20.zip

For convenience, here are pre-patched images:

Player	OF version	URL	Notes
AIGO EROS K	1.3	https://download.rockbox.org/bootloader/aigo/EROSK-v13-patched.upt
AIGO EROS Q	1.8	https://download.rockbox.org/bootloader/aigo/EROSQ-v18-patched.upt
AGPTek H3	1.2 (20180905)	https://download.rockbox.org/bootloader/agptek/H3-20180905-patched.upt
HIFI WALKER H2	1.2	https://download.rockbox.org/bootloader/hifiwalker/H2-v12-patched.upt	Not compatible with v1.3 players!
HIFI WALKER H2	1.3	https://download.rockbox.org/bootloader/hifiwalker/H2-v13-patched.upt	Not compatible with v1.2 players! (created by extracting the v1.3 fw from a running board and patching it)
Surfans F20	2.2	https://download.rockbox.org/bootloader/surfans/F20-v22-patched.upt

-- SolomonPeachy - 11 Oct 2020