Search found 621 matches
- Sun Mar 14, 2021 12:51 pm
- Forum: General Discussion
- Topic: Multiple ESP32 through ethernet with ENC28J60 RJ45
- Replies: 3
- Views: 5843
Re: Multiple ESP32 through ethernet with ENC28J60 RJ45
What Mb/s I can archive with ENC28J60? How much connections per sec? Thats going to depend on many factors including how bad your driver is, how big the packets are, which pins you use for SPI etc, etc. The ESP SPI driver has fairly high latency which would cut badly into bandwidth with smaller pac...
- Sun Mar 14, 2021 12:33 pm
- Forum: ESP-IDF
- Topic: Clear the Queue
- Replies: 2
- Views: 3235
Re: Clear the Queue
Assuming that this is not about the Burger King queue then:
https://www.freertos.org/a00018.html#xQueueReset
https://www.freertos.org/a00018.html#xQueueReset
- Thu Mar 11, 2021 5:27 pm
- Forum: General Discussion
- Topic: LAN8720 iperf test speed insufficient 100Mbps
- Replies: 5
- Views: 7512
Re: LAN8720 iperf test speed insufficient 100Mbps
Lots of people use the LAN8720 for Ethernet (not sure how the Internet is special though) e.g. https://www.esp32.com/viewtopic.php?t=9607 (3) After the lan8720 is powered on, it will always output the clock signal to the GPIO 0 pin.... The basic principles are shown here https://raw.githubuserconten...
- Wed Mar 10, 2021 7:00 pm
- Forum: General Discussion
- Topic: Ethernet to Bluetooth Bridge
- Replies: 3
- Views: 5479
Re: Ethernet to Bluetooth Bridge
As far as I can see you would also need an MQTT server. This would mean having to; (1) Open your network to the cloud and using a cloud server, (2) Install a home server & (say) run mosquitto MQTT server, (3) roll your own ESP MQTT server. I have done (3), its some coding work but the ESP can do it....
- Thu Mar 04, 2021 10:03 pm
- Forum: General Discussion
- Topic: SDS011 particle sensor
- Replies: 5
- Views: 6379
Re: SDS011 particle sensor
the fan of the SDS011 Sorry, missed the earlier clues. Possibly a bit of EMC? A scope on your power lines & signal lines will let you know if there is a 'kick', if you drop 5% below rail then you will need to take action. Lots of cheap scopes on ebay etc. I assume that your grounds are good. You co...
- Thu Mar 04, 2021 9:35 pm
- Forum: General Discussion
- Topic: Bluetooth / BLE licensing/qualification process for esp32
- Replies: 5
- Views: 5507
Re: Bluetooth / BLE licensing/qualification process for esp32
@jimhelios
Why god forbid? I have found CE easier than FCC or maybe its just my locale & experience i.e. UK teams?God forbid, in the EU and Japan it's CE.
- Thu Mar 04, 2021 9:11 pm
- Forum: General Discussion
- Topic: I2C Communication Problem Between ESP32 and STM8
- Replies: 3
- Views: 3219
Re: I2C Communication Problem Between ESP32 and STM8
What do you mean by 'I set STM8S I2C output clock frequency to 100KHz'? The I2C slave must work on the master clock or sample much higher (e.g. like a UART) but then you would have rise/fall propagation delays which you need to match with ESP specification. The slave might work using a faster clock ...
- Wed Mar 03, 2021 11:12 pm
- Forum: General Discussion
- Topic: Creating users with different access levels to set parameters on my ESP32
- Replies: 5
- Views: 4173
Re: Creating users with different access levels to set parameters on my ESP32
Agreed, the question is very general & misses the fact that RESTful is not transport but is a logical/semantic approach. I would however disagree with the cooking analogy - 'What tool is the best tool to make food?' Answer: Wok/Frying pan, often a roasting/baking tray, rarely a pot & never a yogurt ...
- Wed Mar 03, 2021 10:53 pm
- Forum: General Discussion
- Topic: Help Choosing a communication system.
- Replies: 1
- Views: 1867
Re: Help Choosing a communication system.
Communication distance? Data throughput? Update frequency? UPC vrs NRE cost considerations? You seem to be going wireless - is wireless a must & why?. Low power & ESP aren't natural bed fellows but its depends on above. ESP offer an all in one Wifi and BT/BLE but its a dual core & you don't need 100...
- Thu Feb 25, 2021 8:15 pm
- Forum: General Discussion
- Topic: ESP32 uart event example not able to compile as CPP
- Replies: 3
- Views: 4435
Re: ESP32 uart event example not able to compile as CPP
Cool, I did not see 'UART_EVENT_MAX' in your code but then 'default' should cover it. Sometimes the build system breaks. Delete '/build' and rebuild all again. An idf config update should also force a rebuild all. If not cut and paste the switch code and post a MVE. PS Go C++. It makes sense. That s...