Pinouts for M0188 J10 & J5 connections
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Hello! We are trying to use a M0188 adapter board (https://docs.modalai.com/M0188/#lepton-2---j5-external-spi-to-m0104-j10) to connect two leptons to a voxl2 mini. Are the pinouts for J10 & J5 available somewhere? They are listed as TODO on the linked documentation page above.
Thanks,
Jared -
@jared ,
The lepton breakout board pinout is here : https://docs.modalai.com/M0187/#m0187-voxl-2-lepton-adapter
It connects to M0173 J6, which should have the same pinout as M0188 for the lepton connectors: https://docs.modalai.com/M0173/#j6---sm08b-srss-tb
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Perfect! Thank you @Alex-Kushleyev!
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@Alex-Kushleyev Actually one follow-up question - just to confirm, J6 & J10 on the M0188 also operate at 2.8v? The lepton board I'm trying to use (https://groupgets.com/products/purethermal-breakout-board) takes 3-5v input. I just checked the Lepton datasheet and was surprised that the minimum voltage is actually 2.8v. Any experience with these purethermal breakout boards or any idea if this setup will work?
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@jared, yes, all of the Lepton connectors on voxl2 breakout boards are 2.8V. you can try using your pure thermal breakout board with 2.8V input. It is possible that the voltage regulator on your pure thermal breakout board would go in pass-through mode in undervoltage condition with 2.8V input. But obviously we cannot guarantee performance since this would be out of spec for the Pure Thermal board. You could also modify your breakout board to bypass the regulator and feed 2.8 directly to the sensor, but i cannot guarantee any results, you would have to experiment!
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Thanks @Alex-Kushleyev. I hooked up the voxl2 mini to the lepton breakout via the m0188 board and the voxl2 fails to boot (the first green light just stays solid). The voxl2 boots just fine with the m0188 attached if I try without the lepton breakout attached. Does that point to a power issue re:the 2.8v vs 3v mismatch? Or something else?
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And the topmost pin is pin #1 in the view below, correct?
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@jared , you potentially have the pin order swapped. Both sides (M0188) and your leopton breakout board should have the pin1 marked, so just make sure pin1 goes to pin1, etc, otherwise it is a straight through cable, but it could be reversed in your case. Well.. it is only straight through if you use our Lepton breakout board
I doubt that supplying 2.8 instead of 3.3V to the lepton breakout board would cause VOXL2 to fail to boot. If 2.8V is shorted to GND (which would be the case if the wiring is flipped), then this would cause PMIC on VOXL2 to prevent the board from booting.
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That fixed it! Top pin on the M0188 from the view I shared is actually #8, not #1. Thanks for the help!
