Search found 8 matches

by yangff
Mon May 07, 2018 9:04 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 334
Views: 106444

Re: What would you like to see in The Next Chip?

What about improve the functional pin mapping? Many boot strapping pins and other pins that used by on board flash makes it hard for pin arrangement. More confusing, SDIO even overlapped with bootstrapping pins and have different pull-up/down requirements for a 3.3v flash... Also, the exists of thes...
by yangff
Thu Jan 18, 2018 1:20 pm
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 334
Views: 106444

Re: What would you like to see in The Next Chip?

#WhereIsWifiP2P :D
by yangff
Thu Aug 31, 2017 10:02 am
Forum: ESP32 IDF
Topic: If it's possible to use BLE and Bluetooth audio (a2dp) at time time?
Replies: 0
Views: 923

If it's possible to use BLE and Bluetooth audio (a2dp) at time time?

Hi, I'm making something looks like bluetooth headset/speaker but to save battery energy as much as possible. So, in most time it stays quiet and working on BLE. Only when it's playing music, it turn to bluetooth classical. And this process makes sense to me. (I'm not familar with Bluetooth, if it's...
by yangff
Fri Jun 23, 2017 9:18 am
Forum: Hardware
Topic: What's wrong when I move from breadboard to PCB?
Replies: 7
Views: 4755

Re: What's wrong when I move from breadboard to PCB?

OK... After carefully inspected my breadboard, I found the problem... First, I replaced the LDO to AMS1117-3.3 by some ugly wire... Second, I miss connected RX to RX and TX to TX in the pcb.. after some dirty cut and reconnect it finally works... I'm wondering what I'm thinking at that time... :oops...
by yangff
Fri Jun 23, 2017 8:38 am
Forum: Hardware
Topic: What's wrong when I move from breadboard to PCB?
Replies: 7
Views: 4755

Re: What's wrong when I move from breadboard to PCB?

I removed the Li-on chip, shorted USB-VCC to LDO and I can feed ESP-32 is a lot more hot(40°C at least I feel). But still having no output in the terminal... Administrator@WIN-F5GR238P6RA MINGW32 ~ $ python -m serial.tools.miniterm --dtr 0 --rts 0 COM4 115200 --- Miniterm on COM4 115200,8,N,1 --- --...
by yangff
Fri Jun 23, 2017 5:58 am
Forum: Hardware
Topic: What's wrong when I move from breadboard to PCB?
Replies: 7
Views: 4755

Re: What's wrong when I move from breadboard to PCB?

Both RTS/DTR are active low, so to keep them high (ie EN pin high, ESP32 enabled) you will need "miniterm.py --dtr 0 --rts 0 /dev/ttyUSB0 115200" I will try this argument after I get my new LDO. (If you saw the --rts 1 --drt 1 in our docs somewhere, can you please tell me where? Will fix.) It's not...
by yangff
Thu Jun 22, 2017 5:33 pm
Forum: Hardware
Topic: What's wrong when I move from breadboard to PCB?
Replies: 7
Views: 4755

Re: What's wrong when I move from breadboard to PCB?

Thanks a lot. I didn't notice this... I've seen this schematic for ESP8266 in some boards, and when I was drawing them, I read https://github.com/espressif/esptool/wiki/ESP32-Boot-Mode-Selection#automatic-bootloader and it says Make the following connections for esptool.py to automatically enter the...
by yangff
Thu Jun 22, 2017 2:41 pm
Forum: Hardware
Topic: What's wrong when I move from breadboard to PCB?
Replies: 7
Views: 4755

What's wrong when I move from breadboard to PCB?

I'm getting "A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header" when I'm flashing the PCB. From breadboard to PCB, I added a ch340 serial chip (which seems to work, but I'm using FT232 with breadboard), a RT9013 (in theory it should capable for 500mA current) fo...

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