search

stickbreaker / arduino-esp32

Arduino core for the ESP32
38 stars 23 forks source link

I2C with Adafruit Si7021 humidity/temp sensor #41

Closed IraSch closed 6 years ago

IraSch commented 6 years ago

Hardware:

Board: Oddwires IoT ESP32 Dev Module Core Installation/update date: 3/3/2018 (Not sure how to get the actual Core date IDE name: Arduino IDE v1.8.5 Flash Frequency: 80MHz Upload Speed: 921600

Description:

I have been having problems with using I2C on the OddWires IoT ESP32 board for an Adafruit Si7021 humidity/temperature board. It will work for a while (30 minutes to several hours, random), then fail by returning an out of range temperature. From then on, it will report the same temperature until reset.

I tried first installing (overwriting) esp32-hal-i2c.h, .cpp and esp32-hal-log.h in cores, and wire.h and .cpp in the Wire library. This compiled but returned a negative temperature value.

I also tried installing (overwrite) the entire package - same result.

Am I missing something simple? Seems to be communicating but getting some weird value.

Thanks, Ira

Sketch:

Debug Messages:

stickbreaker commented 6 years ago

Try this modified library https://github.com/stickbreaker/Adafruit_Si7021

IraSch commented 6 years ago

Thanks for the suggestion. I will. Do you happen to know if I need to use the stickbreaker core and wire library changes, or does this Si7021 library work with the original core and library files?

Ira

From: chuck todd [mailto:notifications@github.com] Sent: Monday, August 13, 2018 5:23 PM To: stickbreaker/arduino-esp32 arduino-esp32@noreply.github.com Cc: IraSch ischonfeld@comcast.net; Author author@noreply.github.com Subject: Re: [stickbreaker/arduino-esp32] I2C with Adafruit Si7021 humidity/temp sensor (#41)

Try this modified library https://github.com/stickbreaker/Adafruit_Si7021

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/stickbreaker/arduino-esp32/issues/41#issuecomment-412669254 , or mute the thread https://github.com/notifications/unsubscribe-auth/ARD7TBFvqFTY5iL6v7xnsIfj7WE_rY9Nks5uQe4XgaJpZM4V7MD4 . https://github.com/notifications/beacon/ARD7TBb2F4JBhVQKUBVkCJto14M-J4Tsks5uQe4XgaJpZM4V7MD4.gif

stickbreaker commented 6 years ago

Rc3 + But rc4 and release 1.0.0 are broken, waiting on merge of pr1717 Or use Stickbreaker

IraSch commented 6 years ago

A BIG THANK YOU! to Stickbreaker (if there was a larger font I'd be using it).

The combination of replacing the 3 HAL files in the Core folder, and the 2 Wire library files, PLUS using the replacement Adafruit_Si7021 library has been working for 2 days now (watch, now that I've said it, it will probably crash ... ) But seriously, getting this to work was a huge help.

As a side note to anyone who comes across this and needs the fix: The modified Si7021 library needs the updated I2C support to work. It didn't work with the original I2C support. For this reason, I prefixed Stickbreaker's library file names both internally and externally so that the original Adafruit library wasn't effected when using other boards in the Arduino IDE. All I did was rename the files and do a "find/replace" in the 2 files themselves changing from Adafruit_Si7021 to Stkbrkr_Adafruit_Si7021 prior to installing the library.

Thanks again.