Working with 24V

[LTDU]

Very good! I thought about redefining the Serial2 pins to the TMP1/2 (5, 14) or analog (36,39,34,35; marked CH1-CH4 (??)) pins, so I can still use the GSM module later. Any problems with that?

[admin]

analog (36,39,34,35; marked CH1-CH4 (??)) pins can't use for serial, that's just use for INPUT.

[LTDU]

So the only broken out pins that could be used for Serial2 would be TMP1/TMP2 (5/14)?

[admin]

yes.
do you must need use 4G module?

[LTDU]

Not now, maybe later. Where are the Serial pins of the 4G?

[admin]

black socket use by 4G module, have RXD, TXD pins.

[LTDU]

Could you point them out on the drawing for me? (Thanks!) Which pin numbers would that be?

[admin]

here R and T is RXD and TXD.
   

[LTDU]

Can’t wait to get the boards! Could you announce here when they are ready to buy?

Also… Switch 2 (S2) is used to bring the board to download mode (?), but can I use the button after startup for another purpose? Which (pull-up)pin does it belong to?

[admin]

product is ready, just working for uploading to our official store. maybe need about 1 week for make image and video.
S2 download button actaully not need to use for "DOWNLOAD", because our board already have AUTO-DOWNLOAD circuit, never need to use S2, so this button just GPIO0, you can use for your own needs.