0.2.6:
  this a bug fix release
  fixed bug where Pico SDK would rely on ring oscillator being active during clock speed switches that could result in undefined behaviour
  keep USB PLL powered during sleep to avoid clock issues during wakeup
  fixed bug in UART DMA transfer count calculation
  fixed bug with HTTPS connections receive timeout that could lead to reconnects
  disabled autocomplete for radio passwords in HTML form

0.2.5:
  receive UART data from STM32 using DMA and improved IRQ code - this fixes Pico hangup issue introduced in v0.2.2
  show HW version, radio FW revision and UID on administration page and in JSON API
  display seconds on administration page in more readable format
  re-publish GW info on MQTT configuration change
  hide RSSI setting if this is a LoRa device
  don't trigger watchdog timeout when waiting for config download from STM32 (during production)

0.2.4:
  fixed reboot button issue from 0.2.3
  GPIO IRQ handling improvements

0.2.3:
  added watchdog timer that reboots Pico GW after 8s in case firmware should get stuck

0.2.2:
  added UART hardware flow control between Raspberry Pico and radio MCU
  added support for some pulse counter messages
  changes to setting of RTC time