Search found 513 matches
- Sun Dec 16, 2018 9:48 am
- Forum: Hardware
- Topic: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?
- Replies: 14
- Views: 63582
Re: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?
Thanks for the idea. Even a LiFePO4 battery has a voltage which is too high while it is charging. LiFePO4 battery is charged to 3.6V (or 3.65V) and this is within ESP32 voltage range. You can limit the charger voltage to 3.5 V and the battery will still be charged to 99% - 100% depending on type. I...
- Sat Dec 15, 2018 10:05 am
- Forum: ESP-IDF
- Topic: ELF binary parser
- Replies: 6
- Views: 10546
Re: ELF binary parser
A standard elf file is also created during the build process and it can be parsed using any elf parser like 'readelf' <mydir>$ readelf -h -l MicroPython.elf ELF Header: Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 Class: ELF32 Data: 2's complement, little endian Version: 1 (current) OS/ABI...
- Sat Dec 15, 2018 9:39 am
- Forum: ESP-IDF
- Topic: Fatfs delay at write at new sector
- Replies: 14
- Views: 13675
Re: Fatfs delay at write at new sector
May be use flash without fatfs and use the command espartition_write() will the problem persist? Writing directly to flash can be the solution. You should erase the flash sectors range used for logging before using it. Than you can write to the sector without erasing it first, and the 4K sector wri...
- Fri Dec 14, 2018 10:32 pm
- Forum: ESP-IDF
- Topic: Fatfs delay at write at new sector
- Replies: 14
- Views: 13675
Re: Fatfs delay at write at new sector
I created fatfs then I create a file and write data to it every 50 ms. I ran into a problem when the page defined by CONFIG_WL_SECTOR_SIZE_4096=y ends I get a system delay (around 100 ms) at which I miss even a few interrupts from the timer. Therefore, I lose data retrieval from the ADC and lose wr...
- Fri Dec 14, 2018 10:58 am
- Forum: Hardware
- Topic: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?
- Replies: 14
- Views: 63582
Re: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?
You can use LiFePO4 battery instead of Li-ion without any LDO.
- Fri Dec 14, 2018 10:39 am
- Forum: General Discussion
- Topic: Serial Port on Ubuntu on oracle VM
- Replies: 1
- Views: 3171
Re: Serial Port on Ubuntu on oracle VM
You must connect host's USB device (USBtoUART adapter) to the virtual machine.
There are many tutorials how to do this, like this one.
After connected, the port will apear in Ubuntu as /dev/ttyUSB0 (or /dev/ttyUSB1,2,3...).
There are many tutorials how to do this, like this one.
After connected, the port will apear in Ubuntu as /dev/ttyUSB0 (or /dev/ttyUSB1,2,3...).
- Tue Dec 11, 2018 8:23 am
- Forum: Hardware
- Topic: ESP32-PICO-D4 circuit question
- Replies: 3
- Views: 7060
Re: ESP32-PICO-D4 circuit question
Which is not supported. Or, is it?ESP_Lvxinyue wrote: ↑Tue Dec 11, 2018 3:11 am4. No, you don't need to add caps between SVP and SCP, SVN and SCN, unless you want to use the LNA ADC.
- Mon Dec 10, 2018 9:38 am
- Forum: ESP-IDF
- Topic: 2 partition OTA with magnet reset idea feasible?
- Replies: 6
- Views: 7155
Re: 2 partition OTA with magnet reset idea feasible?
It is probably simpler to use reed switch for activation with magnet, you can also use it to wake up from deepsleep...
- Mon Dec 10, 2018 9:30 am
- Forum: ESP-IDF
- Topic: UART baud rate
- Replies: 9
- Views: 32553
Re: UART baud rate
I have tested with 4000000,3500000,3000000,2500000, 2000000 bits/sec on ESP32-WROVER-KIT (with FTDI USBtoSERIAL) and it works.
- Wed Dec 05, 2018 2:11 pm
- Forum: ESP-IDF
- Topic: ESP32 IDF can't compile custom component from Loboris microPython
- Replies: 2
- Views: 4393
Re: ESP32 IDF can't compile custom component from Loboris microPython
FTP server library is not an independent esp-idf component, but deeply integrated with other MicroPython components.
There are other FTP-server componnents on GitHub which may be easier to use.
There are other FTP-server componnents on GitHub which may be easier to use.