Let's Control It

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.

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

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.

nightshark wrote: ↑05 Sep 2017, 17:58 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 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.

manjh wrote: ↑05 Sep 2017, 21:12

nightshark wrote: ↑05 Sep 2017, 17:58 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.

nightshark wrote: ↑06 Sep 2017, 02:06

manjh wrote: ↑05 Sep 2017, 21:12

nightshark wrote: ↑05 Sep 2017, 17:58 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.

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.

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)