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Jumper T8SG - First TX stock running on Deviation
- dc59
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mwm wrote: 2) The included Rx is also undocumented. My best guess after a google is that it's a Superior Hobby RSFSB-S. But there are a number of variations on that, and I'm a bit worn out.
Hi Mike,
Regarding this RX , it's a 8ch F-FHSS compatible RX , Jumper got problem with this RX , there are only 4ch can be used when it bind to T8SG , but it can use 8ch when it bind to Futaba 14SG , Jumper can't figure out what's happen.
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- hexfet
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I was also excited about the printed manual - everyone who contributed is now a published author! To me the "Jumper T8SG" protocol looks like one place that "Devo" should not have been replaced. I think you're correct on the receiver and it's only included in the developer shipments. dc59 said "They do have send you a 8CH S-FHSS RX in package, but they got problem , please check this post ."
One thing I didn't find in the manual was a description of the green LED. Seems to try to follow the bind state, but if no firmware changes were made it must come from a hardware signal somewhere. A pinout for the power connector would be good too as my 2S batteries have a smaller connector.
Personally I'd like a shoulder switch for use as a kill switch. With better gimbals and voice I'd be using it regularly.
Hope you get well soon mwm.
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- dc59
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- Posts: 799
hexfet wrote:
One thing I didn't find in the manual was a description of the green LED. Seems to try to follow the bind state, but if no firmware changes were made it must come from a hardware signal somewhere.
Jumper check each CSN pin to determine antenna switch (PE1 & PE2) then green LED turns on!
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- FDR
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- PhracturedBlue
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- Posts: 4402
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- dc59
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PhracturedBlue wrote: S-FHSS was implemented by victzh I think. I haven't done too much work with the cc2500, but I would probably look at the SPI traces on the receiver when running on the Futaba radio vs Jumper (I assume this issue will likely occur on any .Deviation radio). I don't have access to that Futaba radio. Someone with a compatible Futaba radio and SPI capture tools will likely need to capture the 'good' traces (it could probably be done by looking at the output of the Futaba Tx as well..Not sure who'd want to solder traces onto such an expensive radio tho)
Thanks PB , I don't have that RX(Jumper didn't send it to me.) , I can't test it on other Deviation radio ! I have a Superior Hobby RSFSB-S (one of Futaba S-FHSS compatible RX) , it works fine all 8ch with T8SG.
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- PhracturedBlue
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- victzh
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Since then I bought a real Futaba, T10J, but did not solder to it yet. The problem with the receiver in the Jumper box is that I don't have a good way to test the receiver output - it's an S-BUS, and I don't have S-BUS gear except some old project somewhere.
When I have (or make) testing gear I can try to figure out what's wrong with this RX.
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- Wene001
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- Posts: 277
You can check Sbus with this arduino sketch
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- mwm
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dc59 wrote: Jumper check each CSN pin to determine antenna switch (PE1 & PE2) then green LED turns on!
I saw that, but it didn't make it into my post. Thanks hexfet. So what I see is it comes on, doesn't find anything to bind to, and then goes off. So it's "RF chip active" in some way? Or is that it's not staying on a problem indicator?
Another thing that didn't make it into the first post: case suggestion, ditch the fragile ball joint antenna and ugly metal handle, and use a plastic handle with the antenna in it. That seems to be popular on newer radios, and I haven't heard of any serious problems. In theory, the ball joint will let you adjust the antenna for optimal range, but nobody does that. The horizontal antenna is close to that if you turn to face the aircraft, and loosing that fragile joint is a huge win.
Do not ask me questions via PM. Ask in the forums, where I'll answer if I can.
My remotely piloted vehicle ("drone") is a yacht.
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- Twilight_Sun
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- Posts: 26
mwm wrote:
I use that with devo10. e.g. I set defferent positions with helicopter and cardc59 wrote: In theory, the ball joint will let you adjust the antenna for optimal range, but nobody does that.
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- Gerry
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- Bbrad
- Posts: 194
Devo 7e A7105 NRF24L01 CC2500 2x3 way & voice, Devo 12e 4 in 1 & voice.
FFS (Forever Fixing Stuff)
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- ridgerunner
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- Posts: 13
(I have a 5 cell 2300mAh NiMh that I'd like to use.)
Also, does the T8SG have a switching or linear regulator?
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- mwm
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Do not ask me questions via PM. Ask in the forums, where I'll answer if I can.
My remotely piloted vehicle ("drone") is a yacht.
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- Fernandez
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- Posts: 983
www.taoglas.com/product/wlp-2450-25-4-a-...-patch-antenna-25mm/
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- KnzHz
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- Posts: 10
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- vlad_vy
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- victzh
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- vlad_vy
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www.deviationtx.com/forum/3-feedback-que...ow-servo-range#58610
github.com/pascallanger/DIY-Multiprotoco...col/SFHSS_cc2500.ino
SFHSS_cc2500.ino
// Channel values are 12-bit values between 1020 and 2020, 1520 is the middle.
// Futaba @140% is 2070...1520...970
// Values grow down and to the right.
static void __attribute__((unused)) SFHSS_build_data_packet()
{
uint8_t ch_offset = phase == SFHSS_DATA1 ? 0 : 4;
uint16_t ch1 = convert_channel_16b_nolim(CH_AETR[ch_offset+0],2020,1020);
uint16_t ch2 = convert_channel_16b_nolim(CH_AETR[ch_offset+1],2020,1020);
uint16_t ch3 = convert_channel_16b_nolim(CH_AETR[ch_offset+2],2020,1020);
uint16_t ch4 = convert_channel_16b_nolim(CH_AETR[ch_offset+3],2020,1020);
packet[0] = 0x81; // can be 80 or 81 for Orange, only 81 for XK
packet[1] = rx_tx_addr[0];
packet[2] = rx_tx_addr[1];
packet[3] = 0x0f; //10J
packet[4] = 0x09; //10J
packet[5] = (rf_ch_num << 3) | ((ch1 >> 9) & 0x07);
packet[6] = (ch1 >> 1);
packet[7] = (ch1 << 7) | ((ch2 >> 5) & 0x7F );
packet[8] = (ch2 << 3) | ((ch3 >> 9) & 0x07);
packet[9] = (ch3 >> 1);
packet[10] = (ch3 << 7) | ((ch4 >> 5) & 0x7F );
packet[11] = (ch4 << 3) | ((fhss_code >> 2) & 0x07 );
packet[12] = (fhss_code << 6) | phase;
}
convert_channel(u8 num) can be:
static u16 convert_channel(u8 num)
{
u16 value = 1520 - (s32)Channels[num] * 512 / CHAN_MAX_VALUE;
if (value > 2032)
value = 2032;
else if (value < 1008)
value = 1008;
return value
}
By the way,
"spacer1" + 86 = 1024 + 86 = 1110
"spacer1" + 496 = 1024 + 496 = 1520
"spacer1" + 906 = 1024 + 906 = 1930
1520 (+-410)
I don't know if it has any sense, but "case SFHSS_TUNE:" is also different.
case SFHSS_TUNE:
phase = SFHSS_DATA1;
SFHSS_tune_freq();
SFHSS_tune_chan_fast();
CC2500_SetPower();
return 3150;
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- kmewes
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- Posts: 30
The size might vary so I can provide my source on request.
(btw the adapter shown happens to be the opposite angle of the pair, not the one that fits is in the TX)
Cheers.
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