Release 26.6.2¶
JP150PCB 1.2PCB 1.3Jan PřibyslavskýThis page does not apply to the product or PCB revision chosen in the header.
Released 2026-06-21 for PCB revisions 1.2 and 1.3: the first release with the yy.mm.r version
scheme, and the oldest release this site documents. Its 108 commands are the baseline of the
command reference; a command marked "since 26.6.2" may be older.
The release had no What's New document; this summary comes from the firmware history.
What the release brought¶
- Control over USB. The module enumerates as one composite USB device: USB audio and a virtual COM port that carries the same control command set as the UART. Before, the control interface was available over UART only.
- Settings memory. The driver of the on-board settings EEPROM of PCB 1.3, whose presence also told the firmware the PCB revision; PCB 1.2 has no settings memory. The automatic saving of settings came with 26.7.0.
- True Wireless Stereo. The first working TWS between two modules, with the status LED patterns that show the pairing and the role.
- Level meter. The six-LED level meter fed by the DSP program.
Known issues at the time¶
TWS pairing could be unstable, the external master clock was not supported, and USB audio could resume with a short noise burst after a long silence. The living list is on Known issues.