Hi,
The Aerocomm AC4790/4490 RF Transceiver chips would be fantastic for a range of applications including a UAV (AC4790-200/100 versions have a 4 or 20 mile range at 115 kbps).
Any chance you could do a breakout board with a SPI/I2C bus interface (they have a TTL serial interface . It would be nice to also add a buffer and error handling protocol)?
Cheers, Michael.
I got the dev kit for these a while ago, they work great as a serial cable replacement, but as soon as I put them onto my custom board, they don’t do anything.
Anyhow, would be interesting to see what SFE comes up with!!!
Hi, Take a look at http://aliben.wordpress.com/2006/10/24/ … roduction/.
The author has managed to get simple comms happenning an a 4790 between an eval board and a small breadboard he describes - might be helpful.
Cheers, Michael.
Thanks, I have been following that blog for a while, seems to have gone a bit dead…
Anyway, I tried connecting up just the wires the the pins like he did, but still no luck.
I think now my problem is I am testing it with the Aerocomm program and it only works with the Dev board, I will try it without the board.
I will try and get some pics of my setup.
Basically its just a small board 50x70mm which takes 5v input and regulates it down to 3.3v, then has a header connector for my FTDI usb cables.
Here is a pic of my connections.
http://habnetwork.com/pictures/IMG_4205.JPG
Black/Red = GND / 3.3v
Green = Pulled high with 10K resistos
Yellow / Orange = RX/TX (tried both ways)
Any ideas?? Am I missing something obvious??
did you get any further with this? i’m having a hell of a time getting my radiotronix modules to work (wi.232fhss-250) and i’m 6weeks (and counting) waiting for their support techs to…you know…SUPPORT. :evil: giving up on them, i ordered the aerocomm modules (no dev kit); should be here friday. i’d appreciate any tips if you sorted this.
Haven’t got much further, although I am convinced its some minor stupid thing I am doing wrong… they work fine on the dev boards just not when I try and hook them up…
okay, thanks. if i have any success, i’ll followup on this thread. by the way, have you seen [this page; they show an aerocomm hookup at the bottom of the page. it looks like you did the same thing, so maybe it’s of no use.](PaparazziUAV)
< $30 802.15.4 modules from Maxstream or Jennic or one of 8 others are plug and play. ZigBee stack is not needed for simple apps. Aerocomm too.
what’s their range? i need several miles.
after a 1.5 days of fiddling, i got my ac4490s working. i'm getting clean data @ 19.2k. (the minimum my app requires.) awesome. i could kick myself for wasting 7weeks with those @#$*% radiotronix radios. gussy, shoot me a pm or post here if i can help you get yours working.4mla1fn:
if i have any success, i’ll followup on this thread.
Hey!
So how did you get yours working, do anything I didn’t do as far as my connections go? Any idea’s why mine wouldn’t?
Cheers!
here’s my [harness.
i’m using this usb<->serial [cable. (scroll down)
my initial test was to make sure the modules worked and to configure them for my application (sensor telemetry). i used aerocomm’s [developer software.
note that i left the aercomm CMD/DATA pin unconnected. (in the pic, the white wire looks like it’s tied to Vcc, but it isn’t.) i’d planned to connect it to RTS (the unused pin on my harness), but it finally sunk in that CMD isn’t necessary since the aerocomm module the “enter AT command mode” option. very cool.
so, once you start the development kit, click “pc settings” and configure the port and baud. (the factory baud is 57600.) click the “command” tab. make sure “status request” is selected. make sure “at enter/exit command mode” is checked. (i need this since i left CMD unconnected.) click “send”. if the module is alive, you should see something like this in the “received data”:
0 1 2 3 4 5 6 7 8 9 A B C D E F
0000 CC 87 03
btw, make sure no other radios are on; e.g. if you’re testing a client radio, you don’t want it being bombarded with data from a server radio.
let me know if/how this works out or if you’ve been down this road already.](http://www.aerocomm.com/software/Developer_Kit.zip)](http://www.ftdichip.com/Products/EvaluationKits/TTL-232R-3V3.htm)](http://www.speerschong.com/ac4490_connection.jpg)
Hi! I bought an AC4790 module w/o the development kit… can i still program my chip w/o the development board? is it a necessary? i will be using a Zilog as my OEM for my chip.
BTW i am doing a wireless data acquisition project.
Hoping for a reply…
Hi! I bought an AC4790 module w/o the development kit… can i still program my chip w/o the development board? is it a necessary? i will be using a Zilog as my OEM for my chip.
BTW i am doing a wireless data acquisition project.
Hoping for a reply…
if it’s like the 4470, you should be able to. i didn’t buy the development kits and i’m able to configure it (i assume that’s what you mean by “program my chip”).
how do you program the ac4790 without the development kit?
hoping for a reply
joshua o
