"Frankly, I dont know exactly what they mean by level. But I do know you can't talk to an RS232 port by connecting TTL Tx/Rx pins to it. I don't know the exact details, but my understanding is that voltage is different and HIGH/LOW in RS232…"
Christian Winkler's Discussions
FrSky inverted TTL APM2
Started this discussion. Last reply by Mike Machado Apr 3. 62 Replies 0 Likes
Hi together,i want to use a D4R-II together with APM2, PPM and RSSI are no problem. What i want to connect as well is the serial port of RX and APM2 to send compressed GPS information over the FrSky…Continue
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Renato Aranghelovici replied to Christian Winkler's discussion FrSky inverted TTL APM2"If by level you mean voltage, they are not important in this case.
If you mean logic, i.e. reversal of high - low voltage values for logical 0/1, then these are already reversed in jD-IO.
So, you don't need a max !"
Mike Machado replied to Christian Winkler's discussion FrSky inverted TTL APM2"I just ordered a couple IOBoards so I can send telemetry to the FRSky Rx, and see it on my 9XR transmitter. I also plan to split out the serial port on the DJT and feed it into an antenna tracker.
I am excited to be able to have antenna…"
GearType replied to Christian Winkler's discussion FrSky inverted TTL APM2"You posted awhile ago, but still to follow up, you need an RC filter plus voltage divider for PWM RSSI to analog. See this link :
http://code.google.com/p/minoposd/wiki/AnalogRSSI"
LTMNO replied to Christian Winkler's discussion FrSky inverted TTL APM2"What I am trying to do, is leverage my FrSky Receiver DR8-XP or DR8II-Plus on the Quad-Copter to send Telemetry Data to the GCS with MavLink Data. This could be a potential way of eliminating the need for Xbee or 3DR Data Modems. If it…"
JDronesJani Hirvinen replied to Christian Winkler's discussion FrSky inverted TTL APM2
"Pino it really depends on what you want to do. There are no ready made software for I2C connection but those are fairly easy to add. But again as I have no ideas what you plan so it will be a bit difficult to help"
LTMNO replied to Christian Winkler's discussion FrSky inverted TTL APM2"Hi this is exactly what I have been looking for. Do you any support docs or thread to review? I am very interested in persuing this further with your ioboard.
Thanks
Pino"
Christian Winkler commented on R_Lefebvre's blog post APM2 and Rx All-in-One!"Steven, which SMD resistor is missing? This might be my problem on my APM2 as well."
Crashpilot1000 replied to Christian Winkler's discussion FrSky inverted TTL APM2"Hi!
You said:
"i want to use a D4R-II together with APM2, PPM and RSSI are no problem."
Please, can you tell me how to put the PWM RSSI signal of the d4fr into the apm2, wich normally expects an analog rssi signal?
So long
Kraut Rob"
JDronesJani Hirvinen replied to Christian Winkler's discussion FrSky inverted TTL APM2
"Jetty, sure it's possible to connect I2C but currently none of the APM2 softwares support I2C commands. If you want I2C to work you need to modify software for it."
JDronesJani Hirvinen replied to Christian Winkler's discussion FrSky inverted TTL APM2
"Ravi, it's Arduino mini pro that you need to use. There are several demo sketches in our repository that you can use. One is ...._PWMFlasher"
Jerry Normandin replied to Christian Winkler's discussion FrSky inverted TTL APM2"Jani,
I have an APM 2.0 board. I connect the JD-IOboard RX pin to the mavlink tx port on the APM right?
Is it possible to connect this board to the APM 2.0 I2C bus while utilizing the RX/TX pins for MAVLINK/FrSky…"
Ravi replied to Christian Winkler's discussion FrSky inverted TTL APM2"hi jani, i have bought a jdrones ioboard for arducopter LEDs. can u pls tell what type of board to select when using arduino022 IDE compiler. it has a choice of 4 types of arduino 328. also whcih arduino code to use for the LED to glow without…"
Jerry Normandin replied to Christian Winkler's discussion FrSky inverted TTL APM2"Cool!
I'll order the JD-IOboard tonight! I'm looking forward to testing it."
JDronesJani Hirvinen replied to Christian Winkler's discussion FrSky inverted TTL APM2
"Jerry, First test release is already on our repository. Download that, test it and let me know.
It already supports following messages:
- Temperature
- Accels X, Y, Z
- Altitude
- Groundspeed
- Lat/Lon
- Running time
Get latest software…"
Jerry Normandin replied to Christian Winkler's discussion FrSky inverted TTL APM2"Jani,
The code I'll be looking for will be Mavlink -> FrSky for the JIOBoard right ? No need for APM code?
Where can I get the small connector for the FrSky reciever ? is Hobbyking the only source ?"
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