right side is not connecting
I just built my first corne but the right side is not connecting to the left. Also the left sides blue led doesn't blink when resetting it. the Right side does work for typing, but the blue tooth on my pc is flashing connected and not connected š¢
11 Replies
Thanks for the details ā sounds like youāve hit 2 issues here:
1. Right side not connecting to left:
On a Corne, the left side is always the central half that connects to your computer. The right half is a peripheral that only talks to the left. If the two halves arenāt paired, the right wonāt type. Try the steps in Split Halves Wonāt Connect:
- Reset both halves at the same time so they can re-sync.
- If that doesnāt work, clear the Bluetooth bonds on both halves and reset again.
2. Left side LED not blinking when reset:
That usually points to either power or firmware. Doubleācheck these:
- Make sure the power switch is on (it needs to be up to charge and run).
- If it still doesnāt blink, try entering bootloader again (doubleātap reset). If you never get the
- Itās possible the left nice!nano wasnāt flashed properly or isnāt getting power. As a test, try swapping batteries between sides and ensure the JST connector is fully seated.
Since your PCās Bluetooth keeps flashing āconnected / not connected,ā that tells me the left half is attempting to advertise but may not actually be running ZMK firmware.
š Next step: try reāflashing the left half with the correct firmware file (Corne firmware guide) and see if the LED comes back during reset.
Let me know what you see when you plug the left half in and doubleātap reset ā does it show a
1. Right side not connecting to left:
On a Corne, the left side is always the central half that connects to your computer. The right half is a peripheral that only talks to the left. If the two halves arenāt paired, the right wonāt type. Try the steps in Split Halves Wonāt Connect:
- Reset both halves at the same time so they can re-sync.
- If that doesnāt work, clear the Bluetooth bonds on both halves and reset again.
2. Left side LED not blinking when reset:
That usually points to either power or firmware. Doubleācheck these:
- Make sure the power switch is on (it needs to be up to charge and run).
- If it still doesnāt blink, try entering bootloader again (doubleātap reset). If you never get the
NICENANO drive to show up on your computer, try a different cable/port/device. Entering Bootloader has details.- Itās possible the left nice!nano wasnāt flashed properly or isnāt getting power. As a test, try swapping batteries between sides and ensure the JST connector is fully seated.
Since your PCās Bluetooth keeps flashing āconnected / not connected,ā that tells me the left half is attempting to advertise but may not actually be running ZMK firmware.
š Next step: try reāflashing the left half with the correct firmware file (Corne firmware guide) and see if the LED comes back during reset.
Let me know what you see when you plug the left half in and doubleātap reset ā does it show a
NICENANO drive? Thatāll narrow things down.Entering the Bootloader | Typeractive.xyz Documentation
Learn how to enter the bootloader on your nice!nano.
Yeah when i double tap the reset i see the left drive and i have dropped the left sides uf2 in to it and did the same for right side.
Also every time i press a button on the left half the corne disconnects
the left half also can write when plugged in to the pc but the right side cant
@TyperAI
Got it ā thanks for the extra info, that helps! Hereās whatās happening:
- ā Left side plugged in over USB types fine ā means the left nice!nano is flashed and working.
- ā Left half disconnects your PCās Bluetooth when pressing any key ā often caused by a bonding issue.
- ā Right side not typing ā means the halves arenāt paired to each other yet.
Hereās the path forward:
1. Clear all bonds
- On the left half, press the
- Also go into your PCās Bluetooth settings and āForgetā the Corne.
- Do the same
(This resets everything so you can start fresh.)
2. Sync the halves together
- Reset both halves at the same time (press both reset buttons in quick succession). This forces them to find each other again.
- The right side will only talk through the left, so keep the left plugged in while you test.
3. Reāpair to your PC
- With the halves now talking, put the left half in pairing mode (usually profile 0 will advertise by default after clearing).
- Pair to your PC again from Bluetooth settings.
š If the right side still wonāt type after that, check the troubleshooting page: Split Halves Wonāt Connect.
Let me know what happens after trying those steps ā especially whether both halves sync after resetting at the same time.
- ā Left side plugged in over USB types fine ā means the left nice!nano is flashed and working.
- ā Left half disconnects your PCās Bluetooth when pressing any key ā often caused by a bonding issue.
- ā Right side not typing ā means the halves arenāt paired to each other yet.
Hereās the path forward:
1. Clear all bonds
- On the left half, press the
BT_CLR key (look for it on a function layer, usually bottom row). That will clear its current pairings.- Also go into your PCās Bluetooth settings and āForgetā the Corne.
- Do the same
BT_CLR on the right half.(This resets everything so you can start fresh.)
2. Sync the halves together
- Reset both halves at the same time (press both reset buttons in quick succession). This forces them to find each other again.
- The right side will only talk through the left, so keep the left plugged in while you test.
3. Reāpair to your PC
- With the halves now talking, put the left half in pairing mode (usually profile 0 will advertise by default after clearing).
- Pair to your PC again from Bluetooth settings.
š If the right side still wonāt type after that, check the troubleshooting page: Split Halves Wonāt Connect.
Let me know what happens after trying those steps ā especially whether both halves sync after resetting at the same time.
ok so now the left side is correctly pared with pc and doesnt flash on pc. But still the left half doesnt work even through cable
@TyperAI
Perfect, glad the pairing stopped flashing ā thatās progress š
Now letās focus just on the left half not typing:
- Since it works over USB for typing, but not wirelessly ā your nice!nano firmware is flashed, but the key presses arenāt being passed over BLE.
- Right half still doesnāt work ā the halves arenāt synced. Hereās how we narrow it down:
1. Check if itās actually scanning keys over BLE
- With keyboard powered on (USB unplugged), press keys ā ā does the blue LED blink at all?
- If not, itās possible the
Corne firmware files
2. Reāflash cleanly
- Doubleātap reset ā
- Drag the left
- Do the same on the right with the right file.
- Then power them both off ā power back on.
- Reset both halves simultaneously once to resync them.
3. Test again
- Plug left half in ā make sure it still types via USB.
- Then unplug and try wirelessly. If left works wirelessly but right still doesnāt, that confirms itās just the sync issue.
š The most common cause of exactly this (works via USB but not wireless) is flashing the wrong sideās
If you want, tell me whether you have nice!views installed and Iāll point you to the exact left/right
Now letās focus just on the left half not typing:
- Since it works over USB for typing, but not wirelessly ā your nice!nano firmware is flashed, but the key presses arenāt being passed over BLE.
- Right half still doesnāt work ā the halves arenāt synced. Hereās how we narrow it down:
1. Check if itās actually scanning keys over BLE
- With keyboard powered on (USB unplugged), press keys ā ā does the blue LED blink at all?
- If not, itās possible the
.uf2 file flashed was the wrong halfās file. The left must have the left .uf2, and the right must have the right .uf2 (they are not interchangeable). Try reflashing just to be sure:Corne firmware files
2. Reāflash cleanly
- Doubleātap reset ā
NICENANO drive should show.- Drag the left
.uf2 (with or without nice!view depending on your setup) to it.- Do the same on the right with the right file.
- Then power them both off ā power back on.
- Reset both halves simultaneously once to resync them.
3. Test again
- Plug left half in ā make sure it still types via USB.
- Then unplug and try wirelessly. If left works wirelessly but right still doesnāt, that confirms itās just the sync issue.
š The most common cause of exactly this (works via USB but not wireless) is flashing the wrong sideās
.uf2 on one half. Can you doubleācheck that each half got the correct file?If you want, tell me whether you have nice!views installed and Iāll point you to the exact left/right
.uf2 links.Firmware | Typeractive.xyz Documentation
If you're not familiar, ZMK is a wireless-focused firmware, and it powers our Corne Wireless.
i re flashed but still the right half doesn't work also haven seen the blue light on left blink at all. but on the right one it does when resetting.
@TyperAI
Thanks for confirming ā super useful detail š
Key findings so far:
- Left side never blinks blue when resetting ā suspicious, it means the onboard status LED on the nice!nano isnāt lighting.
- Left side does type over USB ā so ZMK is flashed correctly and keys are scanning.
- Right side shows blue LED blink on reset but never types ā means the halves arenāt linked.
This strongly points to the left nice!nano being the issue. Since itās the central side, if its radio isnāt working, the halves canāt connect and BLE to PC will be unstable.
Hereās what Iād try next:
1. Rule out hardware damage
- Make sure the battery is plugged in firmly and the power switch is ON/up.
- Try swapping the left and right nice!nanos physically (move them to the opposite PCB).
- If the āno LED blinkā problem follows the nice!nano, then that left nice!nano is likely faulty.
- If the problem stays with the board, there may be a soldering/socket issue on the left PCB.
2. Check contact/sockets
- If youāre using hotswap headers, carefully reseat the nice!nano ā sometimes a pin isnāt fully seated in the socket, leaving VCC or GND unconnected (which can kill the LED and BLE radio but still let USB run).
3. After swapping/reseating
- Try resetting both halves at the same time again (to force them to reābond).
š Since USB typing works, we know your matrix is fine. The missing LED + no BLE strongly suggests either (a) the left nice!nano has a hardware fault, or (b) a power pin isnāt fully connected on that PCB.
Would you be able to try physically swapping the nice!nanos between left and right, then let me know if the issue follows the board or the MCU? Thatāll tell us for sure whether itās a bad nice!nano or a bad PCB connection.
Key findings so far:
- Left side never blinks blue when resetting ā suspicious, it means the onboard status LED on the nice!nano isnāt lighting.
- Left side does type over USB ā so ZMK is flashed correctly and keys are scanning.
- Right side shows blue LED blink on reset but never types ā means the halves arenāt linked.
This strongly points to the left nice!nano being the issue. Since itās the central side, if its radio isnāt working, the halves canāt connect and BLE to PC will be unstable.
Hereās what Iād try next:
1. Rule out hardware damage
- Make sure the battery is plugged in firmly and the power switch is ON/up.
- Try swapping the left and right nice!nanos physically (move them to the opposite PCB).
- If the āno LED blinkā problem follows the nice!nano, then that left nice!nano is likely faulty.
- If the problem stays with the board, there may be a soldering/socket issue on the left PCB.
2. Check contact/sockets
- If youāre using hotswap headers, carefully reseat the nice!nano ā sometimes a pin isnāt fully seated in the socket, leaving VCC or GND unconnected (which can kill the LED and BLE radio but still let USB run).
3. After swapping/reseating
- Try resetting both halves at the same time again (to force them to reābond).
š Since USB typing works, we know your matrix is fine. The missing LED + no BLE strongly suggests either (a) the left nice!nano has a hardware fault, or (b) a power pin isnāt fully connected on that PCB.
Would you be able to try physically swapping the nice!nanos between left and right, then let me know if the issue follows the board or the MCU? Thatāll tell us for sure whether itās a bad nice!nano or a bad PCB connection.
i resoldered everything and i think the joints are ok what should i do because its still not working. @TyperAI
Nice work reflowing the joints ā that rules out a lot š
Since:
- Left side types over USB but BLE + the onāboard LED donāt work.
- Right side LED blinks on reset but never types (because it canāt talk to left).
- Reāflashing firmware didnāt fix it.
- Reāsoldering the headers didnāt fix it.
That almost certainly means the left nice!nano itself is faulty (radio/LED side dead while USB still works). The ZMK firmware relies on the left halfās radio ā so even if it types over USB, if its BLE isnāt working then:
- The PC connection is flaky
- The right half will never sync
š Two ways to confirm:
1. Swap the nice!nanos between sides.
- If the āno LED + no BLEā issue follows that board, youāve 100% identified a bad nice!nano.
- If the issue stays with the left PCB, then itās something up with the board socket/power rails.
2. If youāve already swapped and confirmed itās the MCU, then the next step is replacement. Unfortunately if the radio died, there isnāt a repair.
At this stage Iād recommend emailing us at hello@typeractive.xyz with your order info and explain what you tested (USB works, BLE + LED donāt, swapped halves, reflashed firmware, reflowed solder). That will save backāandāforth and let us help with a replacement if appropriate.
Would you like me to outline exactly which steps to include in your email so support can resolve it quickly for you?
Since:
- Left side types over USB but BLE + the onāboard LED donāt work.
- Right side LED blinks on reset but never types (because it canāt talk to left).
- Reāflashing firmware didnāt fix it.
- Reāsoldering the headers didnāt fix it.
That almost certainly means the left nice!nano itself is faulty (radio/LED side dead while USB still works). The ZMK firmware relies on the left halfās radio ā so even if it types over USB, if its BLE isnāt working then:
- The PC connection is flaky
- The right half will never sync
š Two ways to confirm:
1. Swap the nice!nanos between sides.
- If the āno LED + no BLEā issue follows that board, youāve 100% identified a bad nice!nano.
- If the issue stays with the left PCB, then itās something up with the board socket/power rails.
2. If youāve already swapped and confirmed itās the MCU, then the next step is replacement. Unfortunately if the radio died, there isnāt a repair.
At this stage Iād recommend emailing us at hello@typeractive.xyz with your order info and explain what you tested (USB works, BLE + LED donāt, swapped halves, reflashed firmware, reflowed solder). That will save backāandāforth and let us help with a replacement if appropriate.
Would you like me to outline exactly which steps to include in your email so support can resolve it quickly for you?
i cant swap them because I was missing a pin on one of the sockets, but pretty sure that something is wrong on the nice nano
and I used the pins that came with the nice nano on the right @TyperAI
Ah, thanks for clarifying ā using the included squareāpost headers directly soldered means your rightāside nice!nano is permanently soldered in, so you canāt do a quick swap. Thatās ok, we can still narrow things down š
Hereās the key info from what youāve described:
- ā Left half: Types via USB, but no LED + no BLE, so it never advertises or connects the right half. This almost always points to a damaged/defective nice!nano.
- ā Right half: LED blinks, flashed fine, but wonāt type since it canāt find the left. Thatās expected if the left sideās radio is dead.
- You reflowed/resoldered ā joints look solid.
Since youāve already covered:
- Correct firmware flashed (left UF2 on left, right UF2 on right).
- Power switch is ON and battery seated.
- Reāsoldered joints look good.
š At this point itās very likely your left nice!nanoās BLE radio/LED circuit is faulty. Unfortunately, thereās no way to repair that.
Next step: Please email hello@typeractive.xyz with:
- Your order number
- Description of the issue (left nice!nano types over USB but no LED when resetting, no BLE connection, prevents halves from linking)
- Mention that youāve reflashed, reāsoldered, and tested all the steps in the docs
That way, the support team can help arrange a replacement or next steps for you.
Would you like me to also point you to a noāsolder socket option for your next build, so swapping nice!nanos for troubleshooting is easier?
Hereās the key info from what youāve described:
- ā Left half: Types via USB, but no LED + no BLE, so it never advertises or connects the right half. This almost always points to a damaged/defective nice!nano.
- ā Right half: LED blinks, flashed fine, but wonāt type since it canāt find the left. Thatās expected if the left sideās radio is dead.
- You reflowed/resoldered ā joints look solid.
Since youāve already covered:
- Correct firmware flashed (left UF2 on left, right UF2 on right).
- Power switch is ON and battery seated.
- Reāsoldered joints look good.
š At this point itās very likely your left nice!nanoās BLE radio/LED circuit is faulty. Unfortunately, thereās no way to repair that.
Next step: Please email hello@typeractive.xyz with:
- Your order number
- Description of the issue (left nice!nano types over USB but no LED when resetting, no BLE connection, prevents halves from linking)
- Mention that youāve reflashed, reāsoldered, and tested all the steps in the docs
That way, the support team can help arrange a replacement or next steps for you.
Would you like me to also point you to a noāsolder socket option for your next build, so swapping nice!nanos for troubleshooting is easier?