BME280 - No I2C devices found

[nightshark]

I had been using this sensor for several months. Now it loses connection to the I2C bus. It will intermittently start working after a hard reboot, but after 3-5 minutes it's gone. Is it likely the module is dead? I've got an LCD on the I2C bus and it is working fine.

[manjh]

When it dies, did you try an I2C scan (on the tools tab)?

[nightshark]

Yes, nothing found. I can do a soft reset and still nothing. Doing a power cycle will bring it back for a bit. I have checked the wires and connection. Nothing obvious there either.

[manjh]

Yes, nothing found. I can do a soft reset and still nothing. Doing a power cycle will bring it back for a bit. I have checked the wires and connection. Nothing obvious there either.

Strange. Perhaps a conflict with other devices on I2C? Try it on it's own...

[maluko]

i dont have the BME280 sensor but i have another problem with mcp23017 i2c, even buy many to try but happen with all.

on breadboard, the schematic is the same that is on wiki.

when i do a i2c scan i have this:

0x20 PCF8574, MCP23017, LCD Modules
or
0x27 PCF8574, MCP23017, LCD Modules
or


0x20 PCF8574, MCP23017, LCD Modules
0x27 PCF8574, MCP23017, LCD Modules

i tryed with mega and 120.

[nightshark]

Yes, nothing found. I can do a soft reset and still nothing. Doing a power cycle will bring it back for a bit. I have checked the wires and connection. Nothing obvious there either.

Strange. Perhaps a conflict with other devices on I2C? Try it on it's own...

I assuming it's dead then. I tried that too.

[manjh]

Yes, nothing found. I can do a soft reset and still nothing. Doing a power cycle will bring it back for a bit. I have checked the wires and connection. Nothing obvious there either.

Strange. Perhaps a conflict with other devices on I2C? Try it on it's own...

I assuming it's dead then. I tried that too.

I suspect that too. I have a BME280 running without a glitch.

[ManS-H]

I have here the same problem, when i connect a OLED SSD1306, and i use the I2C Scanner in the Tools tab it is visible.
When i connected the BME280 too it is "No I2C devices found"
I used 2 brandnew BME280 and both have the same problem.

I see something strange what i not can explain. I connect vcc, gnd and sda and my oled screen is still visible.
When i connect vcc, gnd and scl i see "No I2C devices found" It looks that the clock wire mades that the BME isn't pop up. Or is this a wrong conclusion?

Maybe i bought the bme280 from a wrong reseller. Give me a url where you bought this module.

I tried it with the 145 and the v2.0.0-dev11 firmware, both the same result.

[TD-er]

Can you please check if the problem also persists when running with the code change I made in this pull-request? https://github.com/letscontrolit/ESPEasy/pull/481
I changed also the measuring parameters, the init and the reset of the sensor.

I had once a similar lock-up, but could not reproduce the situation later on. (before I changed the code)