Search found 2105 matches

by WiFive
Tue Jan 08, 2019 1:42 am
Forum: General Discussion
Topic: (solved) I2C device poses a challenge
Replies: 17
Views: 679

Re: I2C device poses a challenge

20000 = 250 microseconds, max timeout would be 0xFFFFF = 13ms. However in no hold mode the device should be just nacking so you shouldn't be depending on that for your loop delay, use an actual delay.
by WiFive
Mon Jan 07, 2019 10:25 pm
Forum: General Discussion
Topic: (solved) I2C device poses a challenge
Replies: 17
Views: 679

Re: I2C device poses a challenge

You are still using E3 instead of F3. A conversion can take up to 85ms, would your loop cover that amount of time?
by WiFive
Sun Jan 06, 2019 8:09 am
Forum: General Discussion
Topic: (solved) I2C device poses a challenge
Replies: 17
Views: 679

Re: I2C device poses a challenge

There is a maximum measurement time in the datasheet, so just vtaskdelay for at least that long. If you need to optimize you can consider other options.
by WiFive
Sun Jan 06, 2019 7:44 am
Forum: Hardware
Topic: Reading DS18b20 sensors using ESP-IDF using a ESP32 with a 26 MHx XTAL
Replies: 3
Views: 165

Re: Reading DS18b20 sensors using ESP-IDF using a ESP32 with a 26 MHx XTAL

Apb clock should be 80mhz for both crystals, so maybe there is another problem such as the pin you are using is connected to something else internally
by WiFive
Sun Jan 06, 2019 1:39 am
Forum: General Discussion
Topic: (solved) I2C device poses a challenge
Replies: 17
Views: 679

Re: I2C device poses a challenge

If I'm reading the datasheet correctly, I think the ESP32 has to be prepared to begin accepting data from the SHT20 as soon as the SCL line is released...agree? In the Hold Master mode, so don't use that mode. Otherwise you will have to use some of the patches floating around GitHub to support long...
by WiFive
Sun Dec 23, 2018 12:09 am
Forum: ESP32 IDF
Topic: Licensed Firmware, per MCU
Replies: 6
Views: 534

Re: Licensed Firmware, per MCU

There is no public part. You could use a salted hash of the Mac address or serial number or a provisioned token or certificate.
by WiFive
Thu Dec 20, 2018 7:07 am
Forum: Hardware
Topic: ESP32 co-existence with 3rd party 802.15.4/BLE/Zigbee chipset?
Replies: 2
Views: 431

Re: ESP32 co-existence with 3rd party 802.15.4/BLE/Zigbee chipset?

No he's asking about multiple antennas multiple radios which is different.

Particle argon has esp32+nrf52840
by WiFive
Fri Dec 14, 2018 4:12 am
Forum: Hardware
Topic: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?
Replies: 14
Views: 985

Re: How to power the 3.3V ESP32 from a 3.7V Li-ion battery?

There are a lot of boards that support batteries and charging and publish the schematics, check them out.
by WiFive
Wed Dec 12, 2018 6:24 am
Forum: General Discussion
Topic: How long can the esp32 run on batteries while remaining connected?
Replies: 6
Views: 414

Re: How long can the esp32 run on batteries while remaining connected?

Ah ok i see it now. Well hopefully you get some answers on your other posted questions and maybe you can investigate custom bootloader and skip Arduino framework for faster startup. And of course connecting to standard infrastructure is best but if you could double your battery life by using a gatew...

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