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Download available keyboard builds and matching VIA JSON definitions, grouped by product, PCB revision, and wireless backend. Each file includes its size and SHA-256 checksum.

:::warning Confirm before downloading Firmware is not interchangeable across PCB revisions, Ortho / staggered layouts, or wireless backends. Identify your PCB before choosing QMK / VIA or Vial. :::

Quick downloads​

2.4G receiver configurator​

For receivers supporting the BIOI WCH configuration protocol. Start with “remove pairing information”; factory reset also rewrites the USB name and VID / PID for the selected product. See complete instructions and supported profiles.

Windows x64 · standalone console application · download and run the EXE.

Download bioi-dongle-tool.exe
8,064,711 bytes
SHA-2560ec8920f4a674131d0e0817871aee062c89e977cbb75300c1f3a375e2499cdcb

DuoChord nRF51822 migration / OTA files​

:::danger Keep AVR and nRF files separate These files update the wireless module, not the AVR keyboard controller. For first migration, follow the six-step migration guide: confirm PCB → flash matching AVR DuoChord firmware over USB → hold both Shift keys and press F twice within 1 second → confirm DfuTarg → OTA application only → pair again. Never reverse AVR / nRF order. :::

Only the matched .hex and .dat from one release are offered here; their filenames share the same stem and release ID. In Bluefruit Connect, select them under Hex File and Init File respectively. Do not mix files from different releases. S110 8.0.0 / bootloader 0002 are required; these files do not install them. Published as beta: per-model migration and five-host regression are not complete.

Beta · nRF51822 xxAC / S110 8.0.0 / bootloader 0002 · application only. Download both HEX and DAT from this release and use them together.

Application firmware · Hex File
Download duochord_nrf51822_app_sha256-b688f2284471.hex
117,891 bytes
SHA-256d8a925820c9d1c598656e351ca94fea6d912277461bc4321bdea435ad24682fe
OTA initialization file · Init File
Download duochord_nrf51822_app_sha256-b688f2284471.dat
16 bytes
SHA-2565818594e814b65f9122b9a9a18d1ed6011f7755cfdf9f7dd1b3c18c2468447d8

1. Firmware selector​

Only need VIA JSON? Use the download table below without selecting a firmware type.

Firmware and VIA JSON downloads​

Find your PCB and wireless backend in the table, then click UF2, HEX, or JSON to download. _via identifies a QMK / VIA build and _vial identifies a Vial build. Only existing files receive download links. These are build artifacts; not all have been tested on physical hardware.

VIA JSON files are definitions to import into VIA, not flashable firmware. Vial embeds its keyboard definition, so using Vial normally does not require importing these VIA JSON files. Choose files under the same target; similar names do not imply interchangeable firmware.

:::danger First migration from legacy BLE firmware to DuoChord Follow the complete migration guide:

  1. Confirm the PCB revision and wireless backend.
  2. Flash the AVR DuoChord firmware over USB.
  3. Hold both Shift keys and press F twice within one second.
  4. Confirm that the nRF51822 enters DfuTarg mode.
  5. Flash the nRF51822 application-only package over OTA.
  6. Pair again and verify the connection.

The DuoChord keyboard files below contain only AVR firmware, not the separate nRF OTA package. :::

G60

PCBBackendQMK / VIAVialVIA JSON
G60 PCBLegacy BLE firmware (Bluefruit)
HEX ↓70.9 KB
File details
bioi_g60_bluefruit_via.hex
SHA-256
088037faddf313eb61b8eade94584cf52917590caa6def0012f5fa15c2c51843
HEX ↓75.6 KB
File details
bioi_g60_bluefruit_vial.hex
SHA-256
5f2e0a14e3def55958305eb843ed1c460b28b90ecce2910702469f9b8c096e4b
JSON 1 ↓8.9 KB
File details
g60-all-layouts.json
SHA-256
7a657ab5cd8c5f50a57b530277ef5d15dd71ce6bd30e5abc14286e19bd0dfa3a
JSON 2 ↓5.0 KB
File details
g60.json
SHA-256
84a16f3b73636b9a0c9ba5c2a7200dcd1892a63a5c2382b063ac949999c51f47
G60 PCBDuoChordMigration guide
HEX ↓72.1 KB
File details
bioi_g60_duochord_via.hex
SHA-256
909289dc61dabcfbf66ccaeb4dd70d08ae239c36b687eb5536cbc981e359d936
HEX ↓76.5 KB
File details
bioi_g60_duochord_vial.hex
SHA-256
39874940351b63f10241cb0d3e6ef3e0d01fd1366e3db7e4f6fdac904897422b
JSON 1 ↓5.8 KB
File details
g60_duochord.json
SHA-256
b54ecd476cd935c652b2a60de2eda02a640d49ae74afb335b52ee66071cd1c4f
JSON 2 ↓9.8 KB
File details
g60_duochord_all_layouts.json
SHA-256
c5bbf626c5eaff4dc102d2d1a2a48c772d1d75cae0fccc9b0dbb41c8e96f7be0

Kamilia

PCBBackendQMK / VIAVialVIA JSON
Kamilia PCBLegacy BLE firmware (Bluefruit)
HEX ↓61.4 KB
File details
bioi_kamilia_bluefruit_via.hex
SHA-256
5b9e0a662ea99b44a3a77f47b4b1f7d4b88f0bc2bccea32bf27a0a6fd554f102
HEX ↓74.5 KB
File details
bioi_kamilia_bluefruit_vial.hex
SHA-256
e6308b15b51a15dcae271e82821af1f74f486be6cc6a6f7bac66f922912fe307
JSON ↓3.2 KB
File details
kamilia.json
SHA-256
74726a4fbf0016117b0ebb043f5b1ca73f9ddb1accafd62077ce2b23ab1143d6
Kamilia PCBDuoChordMigration guide
HEX ↓63.6 KB
File details
bioi_kamilia_duochord_via.hex
SHA-256
c1b3b44782a4d3187ff56b28655571020ef684ea16230e58473af594b757ca91
HEX ↓76.9 KB
File details
bioi_kamilia_duochord_vial.hex
SHA-256
335d44c840a2155ae2b46bdbd666eae7060b6dc87a6cdd16fc99b21a9fc87d6a
JSON ↓4.2 KB
File details
kamilia_duochord.json
SHA-256
742b3b0ac037dfccdac0f5b07afd3b03a258b0845539d46fe6746297d1de38b1

Command65

PCBBackendQMK / VIAVialVIA JSON
Command65 PCBLegacy BLE firmware (Bluefruit)
HEX ↓77.4 KB
File details
bioi_command65_bluefruit_via.hex
SHA-256
6e0ea3b684b7951fd518444b1ab41ce85350986081ad50b9e4917ea275be3083
HEX ↓74.6 KB
File details
bioi_command65_bluefruit_vial.hex
SHA-256
0176cce5951d025da63d1865d987f3a87db820ed0aea9348d1223e992b47bd65
JSON ↓5.2 KB
File details
command65.json
SHA-256
5b49a7b00e99ac6c426cd44acef120fbd259322b951a6f66dce4b08659aa9bc8
Command65 PCBDuoChordMigration guide
HEX ↓64.5 KB
File details
bioi_command65_duochord_via.hex
SHA-256
6fc73466c7e61e3ed1238144755f5f05f26576ef08333a70f5a70ccaccaa0a10
HEX ↓77.2 KB
File details
bioi_command65_duochord_vial.hex
SHA-256
19e344cae85f9bc77846a497d830329dbaf914ed65b48a4966191c5d6acd6bd1
JSON ↓6.2 KB
File details
command65_duochord.json
SHA-256
287ed2d34da3fd223a4566e09d47b41129d1f2fe96e69ab923ca6fdda3bb06b8

Command65 PE

PCBBackendQMK / VIAVialVIA JSON
Command65 PE PCBCH592
HEX ↓78.0 KB
File details
bioi_command65_pe_via.hex
SHA-256
7da94e0a441470238e6787553ff925191e1bef418bdcf422f20037033033ec8f
HEX ↓75.3 KB
File details
bioi_command65_pe_vial.hex
SHA-256
4790d3953443baf8bd05b21770961acab8082b68265f3c6b8bb5411d016c5312
JSON ↓6.8 KB
File details
command65_pe.json
SHA-256
3ed6f72d7ae86a47951ba740591f42c79a2dde8558a3895c2c193d26c822e359

Manta

PCBBackendQMK / VIAVialVIA JSON
Manta 40s HotswapLegacy BLE firmware (Bluefruit)
HEX ↓77.0 KB
File details
bioi_manta_rev_40s_hotswap_bluefruit_via.hex
SHA-256
729a7349ea236075faf8b5dc1bf4f023f6b696f71ede356f7a99cdb9dc54b5da
HEX ↓73.3 KB
File details
bioi_manta_rev_40s_hotswap_bluefruit_vial.hex
SHA-256
5db9f58ede0cd4da0a6fca9e379033da1c6316a514207a13ded055da619845ef
JSON ↓4.4 KB
File details
manta_40s_hotswap.json
SHA-256
fe861d6d595660563b187a86195d029399184e1445aa38b2e57d0841b37535d2
Manta 40s HotswapDuoChordMigration guide
HEX ↓78.4 KB
File details
bioi_manta_rev_40s_hotswap_duochord_via.hex
SHA-256
8f114b0a31e0e85e71dc0fb7518a4a50d70803098728d5b5c44b18cc9f326b57
HEX ↓74.4 KB
File details
bioi_manta_rev_40s_hotswap_duochord_vial.hex
SHA-256
e7e7de45a1ff1f85b29c692bd7ed818c3896f2c55236984979f987b58e7754d1
JSON ↓5.2 KB
File details
manta_duochord_40s_hotswap.json
SHA-256
74c0876292fb59c5085dbebcc1cb9e97bbeeeab76eb162eb3c82d26dbbda0a0b
Manta 40s SolderableLegacy BLE firmware (Bluefruit)
HEX ↓77.3 KB
File details
bioi_manta_rev_40s_solderable_bluefruit_via.hex
SHA-256
d1fa9ef9d2b3a1808e85dcfe33f94c9b39027ef608bf3c5a2c02f8adba264be1
HEX ↓73.8 KB
File details
bioi_manta_rev_40s_solderable_bluefruit_vial.hex
SHA-256
0f22831207f7365716f3b44ac79ec857b88f2e7056b8f426b776bfe804a48a75
JSON ↓4.4 KB
File details
manta_40s_solderable.json
SHA-256
f460eedafa5c99f2e9d8906923e34b72cd6b396be140e7073c20a6b9e1924bbe
Manta 40s SolderableDuoChordMigration guide
HEX ↓78.7 KB
File details
bioi_manta_rev_40s_solderable_duochord_via.hex
SHA-256
8a9e8916af7edfa3d3f180c184a81fb7b7e6183ce4bf02f1dea402d30b82d73e
HEX ↓74.8 KB
File details
bioi_manta_rev_40s_solderable_duochord_vial.hex
SHA-256
73a51f6353f0c27c6dc49764822d87280fce179859c7864cba6bbdcb83ea4bd3
JSON ↓5.3 KB
File details
manta_duochord_40s_solderable.json
SHA-256
cafd9324ec4de0685c1fef1a4e6f3c086c70be833f45b8779f5c0bc35a765480
Manta OrthoLegacy BLE firmware (Bluefruit)
HEX ↓77.5 KB
File details
bioi_manta_rev_ortho_bluefruit_via.hex
SHA-256
7d1d8402994b3e57c05fa82f1b46a2fece63b9f75307d83c2fdd3931c69f7429
HEX ↓73.8 KB
File details
bioi_manta_rev_ortho_bluefruit_vial.hex
SHA-256
14c37ad765c8de4b8ebb5f4fd4ee7089f648eb8b5c728523b07bb292dbed70d0
JSON ↓3.9 KB
File details
manta_ortho.json
SHA-256
49610673f55ff1ddc9c13e89a5ad5caa33ad51fb6127fe21d4b6ad8ac84fe270
Manta OrthoDuoChordMigration guide
HEX ↓78.2 KB
File details
bioi_manta_rev_ortho_duochord_via.hex
SHA-256
908300481fe3e753ca4c99dbe67a2fd2bcd229e3e1eb58f2f05fd8dd80b3fe1c
HEX ↓74.8 KB
File details
bioi_manta_rev_ortho_duochord_vial.hex
SHA-256
5294db3271d9966564ba81fd07c031bbad7b1d6e1c34ab829359250be61fe989
JSON ↓4.7 KB
File details
manta_duochord_ortho.json
SHA-256
7fd35abc9adc8242d42b4723ba95c5fc97b032706a7651df149efd8ab130fdba
Manta40 rev2CH592
UF2 ↓104.0 KB
File details
bioi_dev_manta40_rev2_via.uf2
SHA-256
75130bb49a7b94e6332374bbe98f36facba82d913e882de9338a09f96b441c23
UF2 ↓129.0 KB
File details
bioi_dev_manta40_rev2_vial.uf2
SHA-256
c92a39075b048715fdfa257c72597528a67739025b0c50f0174b961b5d783d4e
JSON ↓4.5 KB
File details
manta_40s_rev2.json
SHA-256
dfd83d4087ed889dddd7d15abde4b6d31fec3abcedde4f3d3eb34986cb045431
Manta40 rev2 OrthoCH592
UF2 ↓104.0 KB
File details
bioi_dev_manta40_ortho_rev2_via.uf2
SHA-256
fbd040ec6984fb57dd520d0fcaab9a6bd4dffe28a776e5c1d2cd19e06a12c7fa
UF2 ↓129.5 KB
File details
bioi_dev_manta40_ortho_rev2_vial.uf2
SHA-256
cc08ef8a074048ffe1f5093638ca2b253dc04f04f7650bde7894b0d004a85c16
JSON ↓3.8 KB
File details
manta_ortho_rev2.json
SHA-256
bbdf098d1387ec0c365ed916a3a2867c387eb3c840eecb6d1135d0ffe21aaf93

Skog Reboot

PCBBackendQMK / VIAVialVIA JSON
Skog Reboot rev ALegacy BLE firmware (Bluefruit)
HEX ↓113.1 KB
File details
bioi_skog_reboot_rev_a_bluefruit_via.hex
SHA-256
3a3b349e1f6767114393b626f19c85ba19c8f54611c4db14a58b6d4e313baa29
HEX ↓146.9 KB
File details
bioi_skog_reboot_rev_a_bluefruit_vial.hex
SHA-256
128971f4584d28724ff3da096a81827621ab4c9fa6615b71138e4f3b682a0cfa
JSON ↓5.5 KB
File details
skog_reboot.json
SHA-256
f94fc55b02e5aed1edb3e265d0e2440691ecd297afd439e7ab49c145e2f1f63e
Skog Reboot rev ADuoChordMigration guide
HEX ↓112.8 KB
File details
bioi_skog_reboot_rev_a_duochord_via.hex
SHA-256
aeb9f16c45b3d02916423b7496c6c4bae0e830b18da39fa83c558c1a65997088
HEX ↓146.8 KB
File details
bioi_skog_reboot_rev_a_duochord_vial.hex
SHA-256
60cf90f06082ce7eb7b17c68ab80bd9d840e6d0deaa20f84778f05a8348a625c
JSON ↓6.3 KB
File details
skog_reboot_duochord.json
SHA-256
a44bd37dc5f0c8bb3723b9360acd71754d4ec9fb9403fc229f654ee3399b4993
Skog Reboot rev BLegacy BLE firmware (Bluefruit)
HEX ↓113.3 KB
File details
bioi_skog_reboot_rev_b_bluefruit_via.hex
SHA-256
d6781f5f1c1d6d6c09acad5c647915a5e8c08bfbbad5f3d790f741bf1fec4ef0
HEX ↓147.2 KB
File details
bioi_skog_reboot_rev_b_bluefruit_vial.hex
SHA-256
2245a3adf9b72d8bf08f93b67bf6e94c78b059e4dc159351edaeed6b1dd17616
JSON ↓5.5 KB
File details
skog_reboot.json
SHA-256
f94fc55b02e5aed1edb3e265d0e2440691ecd297afd439e7ab49c145e2f1f63e
Skog Reboot rev BDuoChordMigration guide
HEX ↓113.0 KB
File details
bioi_skog_reboot_rev_b_duochord_via.hex
SHA-256
44b43d943cab22bce0764431c344f9a6b61d6811be641267dfafba48b60e2f24
HEX ↓147.2 KB
File details
bioi_skog_reboot_rev_b_duochord_vial.hex
SHA-256
5e3074371beb50a692fe4f1afced2fc9ae0418a50295de6e1772cb466fd88792
JSON ↓6.3 KB
File details
skog_reboot_duochord.json
SHA-256
a44bd37dc5f0c8bb3723b9360acd71754d4ec9fb9403fc229f654ee3399b4993

F60

PCBBackendQMK / VIAVialVIA JSON
F60 rev1USB only
HEX ↓60.4 KB
File details
bioi_f60_rev_1_via.hex
SHA-256
bc23135c104e489a2d8a4f43ebb76a21a4ab2009a3339183b75098cfeb43630f
HEX ↓76.9 KB
File details
bioi_f60_rev_1_vial.hex
SHA-256
030735c8bebecc4f00f318e05308711494aac7330f00c6f71d65766c24184485
JSON ↓5.3 KB
File details
f60.json
SHA-256
b55cd0d6a6993ca708ba4ef815aa766b632f07eccf1f4044c23365f20ae8aac7
F60 rev2USB only
UF2 ↓69.5 KB
File details
bioi_f60_rev_2_via.uf2
SHA-256
918327d1b642dcea5110ebbd03fa0064369427974f668c59c44f36573bb455f9
UF2 ↓95.5 KB
File details
bioi_f60_rev_2_vial.uf2
SHA-256
34193a170022af30f4138fb70f4bb3a8362ec309c5b806cb258159f45bcd215a
JSON ↓8.2 KB
File details
f60m.json
SHA-256
7732dba698980bbc12f7803f2328f928fb90a76fbc438c7f64de54ade953a160
F60 rev3USB only
UF2 ↓99.0 KB
File details
bioi_f60_rev_3_via.uf2
SHA-256
a27fb1c2305deb90a62ea38c44aaa0fbd96934eb1c9b8dcc402115dcf2655dbd
UF2 ↓124.5 KB
File details
bioi_f60_rev_3_vial.uf2
SHA-256
f71e5bc115e567e9973feee72d57fcb94b93e8c2f86d6675b4f13d99016de5ff
JSON ↓8.2 KB
File details
f60m.json
SHA-256
7732dba698980bbc12f7803f2328f928fb90a76fbc438c7f64de54ade953a160
F60 revMUSB only
UF2 ↓69.5 KB
File details
bioi_f60_rev_m_via.uf2
SHA-256
690fe5c5173f41abf6d04a98f179753057c953a47749f08ef87e3578e275e871
UF2 ↓95.5 KB
File details
bioi_f60_rev_m_vial.uf2
SHA-256
f45dd36bc0b3f0c84e8bf1bbfb7350eb71aca7069b2dfdf68e54264d1e75dfb8
JSON ↓8.2 KB
File details
f60m.json
SHA-256
7732dba698980bbc12f7803f2328f928fb90a76fbc438c7f64de54ade953a160
F60wCH592
UF2 ↓107.0 KB
File details
bioi_dev_f60w_via.uf2
SHA-256
634bc60f0f72bf9e3bd955e2031e6e6fb2443238411eadbed107601fb4986022
UF2 ↓133.5 KB
File details
bioi_dev_f60w_vial.uf2
SHA-256
48c44e8161cdcfe602c1cf4352e37b6927b8327feef26605e54456cc234b9d71
JSON ↓9.4 KB
File details
f60w.json
SHA-256
48f6f4a6672c856ce769dceca89dd8c2bc7907e5e1864d9f915ae3d05ffeb0eb

3. Verification and flashing​

Expand File details to view the full file name and SHA-256 checksum and verify download integrity. On Windows, compare it with the output of Get-FileHash <file-path> -Algorithm SHA256.