Firmware-Update with OSTC not possible
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Dirk Lehmann
Apr 17, 2026, 6:00:22 AMApr 17
to Subsurface Divelog
Currently I cannot do Firmware-Updates with my OSTC2.
Problem is, that connection has to be Bluetooth-Classis to be established. BLE ist refused.
But with BT-Classic-connection, as soon as I have chosen the firmware-file, the connection is ended immediately, but no firmware has been transferred.
When I change the Settings of the OSTC2 (Only changed the text) I get an error message "Data RX Timeout" - but the data seems to be transferred.
Any ideas how to transmit the firmware?
BR
Lemmi
Problem is, that connection has to be Bluetooth-Classis to be established. BLE ist refused.
But with BT-Classic-connection, as soon as I have chosen the firmware-file, the connection is ended immediately, but no firmware has been transferred.
When I change the Settings of the OSTC2 (Only changed the text) I get an error message "Data RX Timeout" - but the data seems to be transferred.
Any ideas how to transmit the firmware?
BR
Lemmi
JB2Cool
Apr 17, 2026, 6:04:23 AMApr 17
to subsurfac...@googlegroups.com
I do mine with the OSTConf smartphone app.
Jason
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Michael Keller
Apr 18, 2026, 1:03:02 AMApr 18
to subsurfac...@googlegroups.com
Hi Lemmi.
On 17/04/2026 22:00, 'Dirk Lehmann' via Subsurface Divelog wrote:
> Currently I cannot do Firmware-Updates with my OSTC2.
> Problem is, that connection has to be Bluetooth-Classis to be
> established. BLE ist refused.
> But with BT-Classic-connection, as soon as I have chosen the
> firmware-file, the connection is ended immediately, but no firmware
> has been transferred.
What version of Subsurface are you using, and on which operating system?
From which version to which version are you trying to upgrade your OSTC2?
I did a firmware upgrade on an OSTC plus (same firmware as OSTC2) to
3.34 with Subsurface a couple of weeks ago, and this went smoothly.
But yes, OSTC2 seems to be having a problem with Subsurface when using
BLE at the moment.
Ngā mihi
Michael Keller
On 17/04/2026 22:00, 'Dirk Lehmann' via Subsurface Divelog wrote:
> Currently I cannot do Firmware-Updates with my OSTC2.
> Problem is, that connection has to be Bluetooth-Classis to be
> established. BLE ist refused.
> But with BT-Classic-connection, as soon as I have chosen the
> firmware-file, the connection is ended immediately, but no firmware
> has been transferred.
From which version to which version are you trying to upgrade your OSTC2?
I did a firmware upgrade on an OSTC plus (same firmware as OSTC2) to
3.34 with Subsurface a couple of weeks ago, and this went smoothly.
But yes, OSTC2 seems to be having a problem with Subsurface when using
BLE at the moment.
Ngā mihi
Michael Keller
Michael Keller
Apr 21, 2026, 4:52:01 PMApr 21
to subsurfac...@googlegroups.com
Hi Lemmi.
On 17/04/2026 22:00, 'Dirk Lehmann' via
Subsurface Divelog wrote:
Currently I cannot do Firmware-Updates with my OSTC2.
Problem is, that connection has to be Bluetooth-Classis to be established. BLE ist refused.
But with BT-Classic-connection, as soon as I have chosen the firmware-file, the connection is ended immediately, but no firmware has been transferred.
One thought: As per the instructions in Subsurface, you need to
re-enable the Bluetooth connection on your dive computer before
the firmware upload is started:
When I change the Settings of the OSTC2 (Only changed the text) I get an error message "Data RX Timeout" - but the data seems to be transferred.
This is working flawlessly for me - what firmware version are you using?
Ngā mihi
Michael Keller
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