The new version of FPV System firmware with differential throttle support for twin motor planes is available for download. The throttle settings are available on OSD menu: Autopilot -> AUTO flight -> Throttle Mode. Now is possible to define level of driving motors difference, mix throttle with altitude and define one of throttle control modes: Fixed, Dynamic and Off-On. Details are described in manual: Differential throttle support.
In OSD now is available window showing status of all sensors: Autopilot -> System Status.
Since this version the Ground Station can work with Mavlink telemetry data. It means it can work with other Mavlink systems then ours.
You can see new prototype of autopilot.We decided to refresh hardware after discovering the 2 sensors are obsolete and hardly available on market. In history of AP project it is 4th pressure sensor, 3rd gyroscope and 2nd magnetometer. Some of the sensors are programmed, magnetometer still need to be serviced. After succesfull test flight I can start to order more PCB for production series. Components has been bought and waits for assmebling. Depending how busy is SMT assmebling company, after 3-5 weeks we can expect the new autopilots should be available in our shop.
In this version we removed connectors for I2C (yellow) and for analogue sensors (black). It was added on the begining of the project but from technical reason never used. All dimension of board are the same as in previous versions.
Actualisation 16 October
Parts and boards went to SMD assembling. Should come back after 10 days. Next it require assmebling through whole connectors, programming, testing and calibrating. After it can go to shop.
Actualisation 31 October
I expected to have assembled boards this week but I am still waiting. Had phone calls about technical questions, so most probably assembling is done, now is time for inspection and fixing soldering problems. In Friday we have holiday, so have to wait until next week.
Actualisation 5 November
I have got on my desk SMD assembled AP boards. Just only soldering connectors, programming, testing, calibrating and if no suprises first preordered boards should be send tomorrow.
We open new flying season with new version of FPV System.It contains many small improvements like support of GALILEO system with our new GNSS module, extendend RC monitor, or possibility to trigger OSD menu with choosen channel. All changes are described in document Changes 2.70.
Main goal of this version is support of MavLink protocol by OSD. It allow to use it with any 3-rd party controller supporting this protocol and use well know tools designed for it like MissionPlanner. Detailed description is in separate document MavLink support in Pitlab FPV System 2.70
Previously used module based on Quectel L86 had a few weakness. It had seen only up to 9 satellites and few persons had a situation of loosing position during flight, so at the end of the year I started new project choosing uBlox SAM-M8Q receiver with integrated antenna.
New module has the same dimensions and electrical connections as previous modules. In the office conditions it see up to 20 satellites from GPS and GLONASS constellations. Image below show results of it's work. As previous modules has possibility to add HMC5883 magnetometer, but it is not supported by our projects, so by default is not assembled on board. It has LED signalizing it's state. After power on it light, after getting 3D-FIX it start blinking in 1 sec period.
Click on image to enlarge
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One of the basic trouble for electronic supplier is obsolete component. For a long time was hart do buy super-capacitor for data backup during few minutes power off pauses. Just now without announcement dried source of GNSS receivers. After making market research I choose receivers based on the same chipset, similar antenna so expect similar parameters of work. Just manufactured first series of this module.
Like on previous module this one also can carry magnetometer (not supported by OSD+AP but sometimes it is required for another application). also was predicted use of super-capacitors in another enclosure, so this time lack of capacitors will not surprise us.:-)
New are 2 LEDs. One is for indicating power on, another indicating GPS FIX. Dimension and holes are the same as in old one. As before the module id offered in transparent heat shrink foil, but possible is to put it into Z-47 enclosure.