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by chegewara
Wed Jul 15, 2020 3:32 pm
Forum: ESP32 Arduino
Topic: Using a custom Advertising Address
Replies: 2
Views: 348

Re: Using a custom Advertising Address

Start with this: https://maclookup.app/macaddress/90842B As you can see this is part of mac addresses registered by LEGO System A/S, and here is espressif: https://maclookup.app/vendors/espressif-inc I dont remember now if you can set particular bluetooth mac with IDF API, but its not possible with ...
by chegewara
Wed Jul 15, 2020 3:22 pm
Forum: Hardware
Topic: ESP32-WROVER modules from different batches
Replies: 9
Views: 1064

Re: ESP32-WROVER modules from different batches

I know about one situation, where on wrover E module client has problems with PSRAM.
Sometimes, very often actually, after restart PSRAM is having problem to pass initialization test. I am suspecting hardware problem.
by chegewara
Wed Jul 15, 2020 3:19 pm
Forum: General Discussion
Topic: Why is the ESP32-S2 so big?
Replies: 2
Views: 378

Re: Why is the ESP32-S2 so big?

You have 2 versions of S2 modules, wrover with 2MB PSRAM and wroom.

Actually i like they both are the same, because you can solder one or another on the same PCB, with the same pinout and functionality. One exception is PSRAM pin which cant be used on wrover module but is exposed.
by chegewara
Tue Jul 14, 2020 11:40 am
Forum: ESP32 IDF
Topic: ESP32 throughput and RSSI together
Replies: 3
Views: 309

Re: ESP32 throughput and RSSI together

esp32 is bluetooth 4.2 and does not have 2M PHY.
by chegewara
Tue Jul 14, 2020 10:14 am
Forum: ESP32 Arduino
Topic: I disabled watchdogs but I still get a WDT timeout
Replies: 8
Views: 801

Re: I disabled watchdogs but I still get a WDT timeout

To me it looks like you are having problem with this code now, not wdt: PC: 0x400d0d9c: Print::printNumber(unsigned long, unsigned char) at C:\Users\Derf\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\cores\esp32\Print.cpp line 268 EXCVADDR: 0x00000000 Decoding stack results 0x400d0d9c:...
by chegewara
Tue Jul 14, 2020 10:11 am
Forum: ESP32 Arduino
Topic: Sending info to BLE-server service characteristic
Replies: 8
Views: 630

Re: Sending info to BLE-server service characteristic

The reason i posted code snippet in first place is because you were using string. If you are using string then additional 0x0 can be added at the end. When you are sending binary data its safer to use uint8_t instead of char or std::string, even with strings you can use uint8_t if you dont care abou...
by chegewara
Mon Jul 13, 2020 10:22 am
Forum: ESP32 IDF
Topic: ESP32-S2 HMAC
Replies: 5
Views: 758

Re: ESP32-S2 HMAC

Probably an espressif team member should confirm that, but HMAC is supported:
https://esp32.com/viewtopic.php?f=10&p=56361
by chegewara
Mon Jul 13, 2020 10:16 am
Forum: ESP32 Arduino
Topic: Sending info to BLE-server service characteristic
Replies: 8
Views: 630

Re: Sending info to BLE-server service characteristic

In that case its all fine. App you are using is trying to interpret received values and display in human readable version value. Since its not a string app is trying to interpret it as numbers. So you have 0x0301 little endian it will be 0x103 which is 259 decimal and 0x0101 little endian is 0x101 w...
by chegewara
Mon Jul 13, 2020 3:28 am
Forum: Hardware
Topic: ESP32 Reboots when doing serial comms
Replies: 6
Views: 703

Re: ESP32 Reboots when doing serial comms

Brento wrote:
Sat Jul 11, 2020 12:11 am

ledcAttachPin(10, 1);
Pin 10 is reserved.
Pins pins 6-11 are used for flash on module.
by chegewara
Mon Jul 13, 2020 3:24 am
Forum: ESP32 Arduino
Topic: BLE Server, problems with custom advertisement and manufacturer data
Replies: 2
Views: 295

Re: BLE Server, problems with custom advertisement and manufacturer data

Here is error: char ManufacturerData[8] = {0x97,0x03,0x00,0x80,0x06,0x00,0x61,0x00}; char string is 0x0 terminated. std::string is not. Here is simple test code: #include <string> char ManufacturerData[8] = {0x97,0x03,0x00,0x80,0x06,0x00,0x61,0x00}; std::string test(ManufacturerData, 8); void setup(...

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