Search found 37 matches

by Cellie
Fri Apr 27, 2018 7:08 am
Forum: Hardware
Topic: Unknown revision esp32? revision (unknown 0xa)
Replies: 7
Views: 529

Re: Unknown revision esp32?

@ESP_Angus & WiFive: Thanks for the explanation. Made things clear. For reference (from https://github.com/espressif/esp-idf/blob/cc2d1fda964afb310c0ffa9b1bf9d2065b7121f2/components/soc/esp32/include/soc/efuse_reg.h#L94-L99 ): /* EFUSE_RD_CHIP_CPU_FREQ_RATED : R/W ;bitpos:[13] ;default: 1'b0 ; *...
by Cellie
Thu Apr 26, 2018 2:13 pm
Forum: Hardware
Topic: Unknown revision esp32? revision (unknown 0xa)
Replies: 7
Views: 529

Unknown revision esp32? revision (unknown 0xa)

Today I received some new MH-ET mini kits . With esptool 2.3.1 ( on Linux Mint 17.2 Rafaela ) I get this output when I flash the chip: Connecting..... Chip is ESP32D0WDQ6 (revision (unknown 0xa) Features: WiFi, BT, Dual Core, VRef calibration in efuse The markings on the RF can are also a bit differ...
by Cellie
Mon Apr 16, 2018 12:50 pm
Forum: ESP32 Arduino
Topic: Conflict WiFi with dallas temperature library for ds18b20 ???
Replies: 3
Views: 430

Re: Conflict WiFi with dallas temperature library for ds18b20 ???

No idea why the network scan would interfere. I do have some code which should run. https://github.com/CelliesProjects/dallas-webserver https://github.com/CelliesProjects/esp32-multi-DS18B20-task And check out stickbreakers OneWire repo . This lib solves a lot of OneWire problems, and the solutions ...
by Cellie
Sat Apr 14, 2018 2:31 pm
Forum: ESP32 Arduino
Topic: Heltec ESP W32 Kit with OLED (beginner)
Replies: 2
Views: 1310

Re: Heltec ESP W32 Kit with OLED (beginner)

I have made a millisecond clock poc on a similar OLED.
Shows some basic concepts.

https://gist.github.com/CelliesProjects ... 1054c409c3

You probably need to change the pin definitions.
by Cellie
Sat Apr 07, 2018 8:52 pm
Forum: ESP32 Arduino
Topic: Compiler does not report space taken by big char arrays??
Replies: 13
Views: 742

Re: Compiler does not report space taken by big char arrays??

I just tried this: char filbuff1[86410]; char filbuff2[86410]; void setup() { // put your setup code here, to run once: filbuff1[0]=0; filbuff2[0]=0; } void loop() { // put your main code here, to run repeatedly: } Which gives: region `dram0_0_seg' overflowed by 68512 bytes Which basically means not...
by Cellie
Sat Apr 07, 2018 8:46 pm
Forum: ESP32 Arduino
Topic: Compiler does not report space taken by big char arrays??
Replies: 13
Views: 742

Re: Compiler does not report space taken by big char arrays??

I just compiled this test: static char filbuff1[86410]; void setup() { // put your setup code here, to run once: filbuff1[0]=0; } void loop() { // put your main code here, to run repeatedly: } Which gives: Global variables use 10888 bytes (3%) of dynamic memory, leaving 284024 bytes for local variab...
by Cellie
Sat Apr 07, 2018 8:20 pm
Forum: ESP32 Arduino
Topic: Compiler does not report space taken by big char arrays??
Replies: 13
Views: 742

Re: Compiler does not report space taken by big char arrays??

If you declared them in a function, they are not counted as 'Global variables' but are 'Local variables'. Global declaration: char filbuff1[86410]; void setup() { // put your setup code here, to run once: filbuff1[0]=0; } void loop() { // put your main code here, to run repeatedly: } Gives: Global v...
by Cellie
Sat Apr 07, 2018 7:02 am
Forum: ESP32 Arduino
Topic: Newbie in need of a little help (DS18B20)
Replies: 12
Views: 724

Re: Newbie in need of a little help (DS18B20)

and you still need a free pin to feed your sensors.

Yeah, you are right, what was I thinking when I made that post?
No idea...
by Cellie
Fri Apr 06, 2018 2:49 pm
Forum: ESP32 Arduino
Topic: Newbie in need of a little help (DS18B20)
Replies: 12
Views: 724

Re: Newbie in need of a little help (DS18B20)

You can have the sensors do their conversions one at a time

Yes, that is of course a possibility.

I did not mention that as it adds to code complexity and you still need a free pin to feed your sensors.