• Blue LED blinks: pls upload the FW with bootloader mode.
• Blue LED OFF: check if the HUBOSD is fake.

There is compatibility bug on PAL of Rumcam Eagle & Foxeer  Monster,  Pls use NTSC now. or degrade it to V3.3. We will fix the code soon.

Firmware  V3.5 (Mar.04,2017)

• Fixed the bug of mAh disappearing.
• Fixed the voltage calibration & Pilot ID bugs

Firmware  V3.3  (Jan.13,2017)

• Fixed the conflict between voltage/mah alarm flash frequency & NTSC video Freq.( voltage/mah readouts disappear when their thresholds are reached)
• Optimized battery cells detection.
• Increase the Voltage & Current refreshing rate

Firmware  V3.2  (Sep.23, 2016)

• New code for max7456, fix the missing & messy OSD info when max7456 is interfered by ESC ripples & spikes.

Firmware  V3.1  (Sep.11, 2016)

• Add RSSI function (Beta Version, Support Frsky RX, Auto RSSI display)
• Voltage format can be set.  Total (Default) or Cell (4×3.96 format)
• Center Crosshair Enable or Disable . Default is Enable
• Battery voltage cellibration (measure the LiPo voltage with multimeter, write mV format in the table, such as “16280”, then click “Cali”)

Firmware V2.6

• Extend the cell voltage detection range to 4.45V/cell.
• Add ” – ” crosshair in the middle of the screen.

Firmware V2.4

• Move the time & mAh to the left one character.
• Optimize algorithm of max.Amp.

STOSD8 tool  1.0.1.0

•  STOSD8-SE Support
• Cancel the “Load FW online”.  Pls download the FW from website according to your OSD version.

STOSD8 tool  1.0.0.9

• Add Voltage format option
• Add Center Crosshair option
• Add Battery voltage calibration table
• Warning mAh can be set from 500mAh