Search found 18 matches

by JimmyPedersen
Fri Apr 03, 2020 6:48 am
Forum: ESP IoT Solution
Topic: BLE Connection stops adverticement on AT-Firmware
Replies: 2
Views: 4725

BLE Connection stops adverticement on AT-Firmware

Hi. I'm thinking about using an ESP32 module with the AT commands firmware as an ALT beacon that is set up by another "Master" CPU. I've got it working but as soon as I connect with a phone the advertisement stops until I send AT+BLEADVSTART to the ESP32. I could send AT+BLEADVSTART every second or ...
by JimmyPedersen
Sat Jan 05, 2019 9:53 am
Forum: ESP32 IDF
Topic: AWS IoT and HTTPS are mutually failed
Replies: 16
Views: 4056

Re: AWS IoT and HTTPS are mutually failed

I finally found the final answer. It was caused by the stack overflow. Which stack? I don't know. But when I reduced the size of each my stacks, it worked. I used stack high water mark to check some stacks, including the system stacks, I could reach out but found none. Anyway, it works now. Samson ...
by JimmyPedersen
Mon Dec 24, 2018 11:41 am
Forum: ESP32 Arduino
Topic: BUG: ESP32 dev board and reading sd card's (high power consumption + ESP32 hangs)
Replies: 3
Views: 1680

Re: BUG: ESP32 dev board and reading sd card's (high power consumption + ESP32 hangs)

Could it be that the esp8266 powers up the SD card on init while the ESP32 powers it up on first access? The 18mA extra draw after using the SD card is probably from it being powered. If you want to stop that I would assume that you need to power down the SD card and then do a re-init the next time ...
by JimmyPedersen
Thu Mar 15, 2018 2:51 pm
Forum: General Discussion
Topic: Wifi / Bluetooth Problems with custom Board
Replies: 6
Views: 3099

Re: Wifi / Bluetooth Problems with custom Board

Just guessing but can it be a power supply issue?
Takes a lot more power to connect to an AP than to just scan for them.
Are you sure you can supply enough power to the ESP? Do you have sufficient decoupling next to the power pins?
Good luck
Jimmy
by JimmyPedersen
Sat Jan 20, 2018 9:58 pm
Forum: Report Bugs
Topic: ESP_LOGD crashes when a %s parameter is NULL
Replies: 1
Views: 1485

Re: ESP_LOGD crashes when a %s parameter is NULL

The following code snipplet results in a program crash: char *string = NULL; ESP_LOGD( TAG, "*** crash here %s", string ); Since the ESP_LOG * functions are often used for debugging, it is more than annoying when these functions themselves crash, because the parameters are not well defined. I would...
by JimmyPedersen
Sat Dec 30, 2017 1:35 pm
Forum: General Discussion
Topic: Happy Holidays! (W/ binary for your ESP32!)
Replies: 19
Views: 8615

Re: Happy Holidays! (W/ binary for your ESP32!)

Hi Tried it with an LOLIN32 v.1.0.0 board but I got no signal on the outputs (Checked with oscilloscope). Here's the output from the flashing: c:\Users\Jimmy\OneDrive\holidays2017>python c:\esp-idf\components\esptool_py\esptool\esptool.py --port com7 --baud 230400 write_flash 0 holidays2017.bin espt...
by JimmyPedersen
Thu Sep 28, 2017 8:07 pm
Forum: Showcase
Topic: ELLO 3M 'TROLL' computer
Replies: 11
Views: 5817

Re: ELLO 3M 'TROLL' computer

An alternative to Python you might want to check out is Mongoose-OS. https://mongoose-os.com Then you could write your code in, a somewhat reduced, Javascript (or c++) . Mongoose-os also has a lot of cool functionality like extendable RPC support, built in webserver, FOTA and tools to easily connect...
by JimmyPedersen
Fri Sep 22, 2017 3:34 pm
Forum: General Discussion
Topic: HWCrypto VS MbedTLS
Replies: 18
Views: 11934

Re: HWCrypto VS MbedTLS

Could it be that there is some over head associated with setting up the hw crypto unit that causes these poor numbers. What happens if you use bigger input and output blocks? For example En/De-crypt 256 bytes instead of 16.

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