Search found 70 matches
- Fri Aug 07, 2020 2:45 am
- Forum: ESP32 Arduino
- Topic: ESP32-DevKitS Arduino IDE: Timed out waiting for packet header
- Replies: 2
- Views: 221
Re: ESP32-DevKitS Arduino IDE: Timed out waiting for packet header
Instructions for the devkits are at https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/user-guide-devkits-r-v1.1.html#how-to-flash-a-board. Using the default "esp32 dev module" in Arduino IDE is just fine. There are many articles here and on the github repo about these ti...
- Wed Jul 29, 2020 3:37 pm
- Forum: ESP32 Arduino
- Topic: ESP32 strange issue with using SPI device
- Replies: 2
- Views: 195
Re: ESP32 strange issue with using SPI device
You say your esp and spi have separate power sources. They must have common grounds. Honestly, having multiple 3v3 domains in a project like this is just asking for a small fire.
- Wed Jul 22, 2020 9:24 pm
- Forum: ESP32 Arduino
- Topic: Many ESP32 modules on single wifi access point?
- Replies: 3
- Views: 358
Re: Many ESP32 modules on single wifi access point?
It will be dependent on the capability of the router. There should be no issue from the esp side with 50 independent nodes. You could also use wifi mesh https://docs.espressif.com/projects/esp-idf/en/v3.3.2/api-guides/mesh.html, which should work with minor tweaking up to 100 nodes, and the mdf clai...
- Sat Jul 18, 2020 3:42 am
- Forum: ESP32 Arduino
- Topic: ESP32-Time
- Replies: 1
- Views: 368
Re: ESP32-Time
The toolchain includes a lot of stdlib time functions, including gettimeofday:
The second parameter for getLocalTime is the length of time to wait for a valid result, so not relevant here.
Code: Select all
struct timeval tv;
gettimeofday(&tv, NULL);
Serial.printf("microseconds: %d\n", tv.tv_usec);
- Tue Jul 14, 2020 12:56 am
- Forum: ESP32 Arduino
- Topic: ESP32 connection for GPS and microSD
- Replies: 3
- Views: 446
- Mon Jul 13, 2020 3:28 pm
- Forum: ESP32 Arduino
- Topic: GPS with ESP32 SoftwareSerial
- Replies: 7
- Views: 980
- Mon Jul 13, 2020 2:30 pm
- Forum: ESP32 Arduino
- Topic: ESP32 - Timestamps
- Replies: 1
- Views: 246
Re: ESP32 - Timestamps
You can use a real time clock run off a battery.
https://www.aliexpress.com/item/32798201168.html
https://www.aliexpress.com/item/32798201168.html
- Sat Jul 11, 2020 2:37 am
- Forum: ESP32 Arduino
- Topic: Heltec ESP32 battery (what and where to buy)
- Replies: 1
- Views: 196
Re: Heltec ESP32 battery (what and where to buy)
Unless your board includes charging equipment, it is probably dangerous to use the battery connector. 3.7V lipo batteries can be easily found on almost any online marketplace- amazon, aliexpress, gearbest, banggood.
- Sat Jul 11, 2020 1:46 am
- Forum: ESP32 Arduino
- Topic: ledcWrite and Serial.println Conflict?
- Replies: 2
- Views: 288
Re: ledcWrite and Serial.println Conflict?
pin 10 is not available on either board. Please consult a pinmap https://github.com/espressif/arduino-es ... ard-pinmap
- Wed Jul 08, 2020 6:16 pm
- Forum: ESP32 Arduino
- Topic: unstable WIFI connection
- Replies: 3
- Views: 457
Re: unstable WIFI connection
esp32 uses power management features for WiFi, so it turns off the radio in between beacon adverts. TCP packets get held by the access point until the device checks in. Datagrams will be dropped. Turn off modem sleep with `WiFi.setSleep(false);`