New Hubsan Upgraded Version on the way

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29 Dec 2013 20:17 #17432 by goebish
Replied by goebish on topic New Hubsan Upgraded Version on the way

HappyHarry wrote: guys i'm being given an H107L as a late christmas present and i'm wondering is it possible to pull the a7105 module from the stock tx? or will i need to order one elsewhere? if so any reccomendations?

thanks in advance


There's no module in the H107L TX, you'll have to find another one, search ebay for a7105-500m for example.

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29 Dec 2013 22:12 #17437 by HappyHarry
Replied by HappyHarry on topic New Hubsan Upgraded Version on the way
thanks for the info, i take it the chip is hardwired into the main pcb then?

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29 Dec 2013 22:30 - 29 Dec 2013 22:32 #17439 by SeByDocKy
Replied by SeByDocKy on topic New Hubsan Upgraded Version on the way
Sorry, I inserted the wrong photo




Attachments:
Last edit: 29 Dec 2013 22:32 by SeByDocKy.

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29 Dec 2013 22:41 - 29 Dec 2013 22:41 #17440 by HappyHarry
Replied by HappyHarry on topic New Hubsan Upgraded Version on the way
n/m
Last edit: 29 Dec 2013 22:41 by HappyHarry.

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29 Dec 2013 23:20 #17442 by goebish
Replied by goebish on topic New Hubsan Upgraded Version on the way

SeByDocKy wrote: Sorry, I inserted the wrong photo


We can't see the traces, they must be underneath the 2.4 RF module, if you have a multimeter with fine tips you'll have to find the connections from the a7105 chip sdio, sck and scs to the module header pins.

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29 Dec 2013 23:31 #17443 by SeByDocKy
Replied by SeByDocKy on topic New Hubsan Upgraded Version on the way

goebish wrote:

SeByDocKy wrote: Sorry, I inserted the wrong photo


We can't see the traces, they must be underneath the 2.4 RF module, if you have a multimeter with fine tips you'll have to find the connections from the a7105 chip sdio, sck and scs to the module header pins.



Compare to your scheme and my photo, the point is located on top right. So there is a rotation of +90 deg.... I think it's easy to find all those pins :)

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29 Dec 2013 23:38 #17444 by goebish
Replied by goebish on topic New Hubsan Upgraded Version on the way
Yes, they are easy to find on the chip, now you've to trace the 3 interesting pins to their corresponding pins on the module header

Unless you want to try to solder wires directly on the QFN chip :P

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30 Dec 2013 07:43 #17461 by SeByDocKy
Replied by SeByDocKy on topic New Hubsan Upgraded Version on the way

goebish wrote: Yes, they are easy to find on the chip, now you've to trace the 3 interesting pins to their corresponding pins on the module header


Unless you want to try to solder wires directly on the QFN chip :P


My next question concerning the logic analyser... I think I will have only female/female wire .... I need some female/male or some female/mini-croco :)

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30 Dec 2013 07:47 - 30 Dec 2013 07:47 #17462 by midelic
Replied by midelic on topic New Hubsan Upgraded Version on the way
Come on!
Lol!
Last edit: 30 Dec 2013 07:47 by midelic.

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30 Dec 2013 07:58 #17463 by Xermalk
Replied by Xermalk on topic New Hubsan Upgraded Version on the way
From Rcgroups Hubsan 107D thread.

"got it to work, by soldering 2 wires on the + and - of the VTX board, and the main + and - of the battery cable of the TX.

It's working but at 5860 MHZ only !! At least, I have it working ! I was desperating having it to work..

Now, it's heating a little bit, but it works."

Apparently the video tx module works just fine with only the power wires connected, unfortunately not on a boscam frequency.

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30 Dec 2013 09:46 #17468 by goebish
Replied by goebish on topic New Hubsan Upgraded Version on the way
I'll try to understand how to set the frequency once I have one.

That's weird, in SeByDocKy's picture I can see CS0, CS1 and CS2 on the vRX, just as if it was a "classic" 8 channels vRX.

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30 Dec 2013 09:56 #17469 by SeByDocKy
Replied by SeByDocKy on topic New Hubsan Upgraded Version on the way
Here is the A7105 module of the H102D and in the general for the first generation of FPV TX of hubsan product



For the 3 CS pins ... it's strange coz in fact, I can also select a channel with +5Mhz increment ....
Attachments:

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30 Dec 2013 09:57 #17470 by goebish
Replied by goebish on topic New Hubsan Upgraded Version on the way

SeByDocKy wrote:

goebish wrote: Yes, they are easy to find on the chip, now you've to trace the 3 interesting pins to their corresponding pins on the module header


Unless you want to try to solder wires directly on the QFN chip :P


My next question concerning the logic analyser... I think I will have only female/female wire .... I need some female/male or some female/mini-croco :)

A few wire scraps will be OK, no need to buy anything else.

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30 Dec 2013 10:00 #17472 by goebish
Replied by goebish on topic New Hubsan Upgraded Version on the way

SeByDocKy wrote: Here is the A7105 module of the H102D and in the general for the first generation of FPV TX of hubsan product


I wonder why they removed the RF amp in the newer versions ...

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30 Dec 2013 10:02 #17473 by SeByDocKy
Replied by SeByDocKy on topic New Hubsan Upgraded Version on the way

goebish wrote:

SeByDocKy wrote:

goebish wrote: Yes, they are easy to find on the chip, now you've to trace the 3 interesting pins to their corresponding pins on the module header


Unless you want to try to solder wires directly on the QFN chip :P


My next question concerning the logic analyser... I think I will have only female/female wire .... I need some female/male or some female/mini-croco :)

A few wire scraps will be OK, no need to buy anything else.


I think I will be able to use directly the female connecor on the pin .. there is enough space I guess

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30 Dec 2013 10:03 #17474 by SeByDocKy
Replied by SeByDocKy on topic New Hubsan Upgraded Version on the way
Coz it's for a nanoquad.... My TX was designed for spyhawk plane which have something link 500m of control range.

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30 Dec 2013 10:06 #17475 by goebish
Replied by goebish on topic New Hubsan Upgraded Version on the way
Does the H102D have telemetry ?
I'm working on it now and should have something to test soon.

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30 Dec 2013 10:36 #17476 by goebish
Replied by goebish on topic New Hubsan Upgraded Version on the way

HappyHarry wrote: thanks for the info, i take it the chip is hardwired into the main pcb then?

Yes:

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30 Dec 2013 11:03 #17477 by SeByDocKy
Replied by SeByDocKy on topic New Hubsan Upgraded Version on the way

goebish wrote: Does the H102D have telemetry ?
I'm working on it now and should have something to test soon.



No telemetry :( but maybe everything is here and with your work maybe we can expect a miracle ....

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30 Dec 2013 19:24 - 31 Dec 2013 00:11 #17497 by goebish
Replied by goebish on topic New Hubsan Upgraded Version on the way
I'm currently trying to implement telemetry and I'm having an issue, I can control the quad for a few seconds (random, 1s-15s maybe) then motors stop and controls stop working.

I only have a H107L but adding telemetry shouldn't change anything for it.

Here's my code, I hope an A7105 expert (PB, Midelic ?) can help to debug, I've probably overlooked something obvious..

from hubsan_cb():
case DATA_1:
case DATA_2:
case DATA_3:
case DATA_4:
case DATA_5:
    if( txState == 0) // send frame
    {
        if(state == DATA_1)
            A7105_SetPower(Model.tx_power); //Keep transmit power in sync
        hubsan_build_packet();
        A7105_Strobe(A7105_STANDBY);
        A7105_WriteData(packet, 16, state == DATA_5 ? channel + 0x23 : channel);
        if (state == DATA_5)
            state = DATA_1;
        else
            state++;
        delay=3000;
    }
    else 
    {
        if( txState == 1) // switch to rx mode 3ms after packet sent
        {
            A7105_Strobe(A7105_RX);
            A7105_Strobe(A7105_RX); // 0xc0 appears twice in the dump 
        }

        for( i=0; i<20; i++)
            if(!(A7105_ReadReg(A7105_00_MODE) & 0x01)) // data received ?
            {
                A7105_ReadData(packet, 16); // A7105_RST_RDPTR + 16x A7105_05_FIFO_DATA
                Telemetry.p.hubsan4.volt = packet[13];
                A7105_Strobe(A7105_RX);
                break;
            }
        delay=1000;
    }

    if (++txState == 8) // 3ms + 7*1ms
        txState = 0;
            
    return delay;

If I remove A7105_ReadReg(A7105_00_MODE) and following instructions in the if block there's no problem anymore.

I'm pulling my hair (or what remains of it).

... and I don't even know if it actually grabs telemetry data during the few seconds it works because I do not have a H107D.

Anyone with one wants to try a build ? :P
Last edit: 31 Dec 2013 00:11 by goebish. Reason: typo

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