Search found 9 matches
- Sun Jan 30, 2022 7:11 pm
- Forum: ESP32 Arduino
- Topic: view measurements of a sensor via WiFi
- Replies: 4
- Views: 5912
Re: view measurements of a sensor via WiFi
Writing out what you want to achieve presumably looks something like ... initially ... open a wifi connection to an access point open a transport layer connection to a server / your computer next ... every 1 ms > check connection, handle disconnection > read MPU6050 acceleration (x,y,z values) > sen...
- Thu Jan 27, 2022 11:30 am
- Forum: ESP32 Arduino
- Topic: view measurements of a sensor via WiFi
- Replies: 4
- Views: 5912
Re: view measurements of a sensor via WiFi
Perhaps you could tell us more about your requirement.
For example, what is the accelerometer measuring, how often, are you seeking real-time readings, what are you expecting at server ...?
For example, what is the accelerometer measuring, how often, are you seeking real-time readings, what are you expecting at server ...?
- Thu Jan 27, 2022 11:05 am
- Forum: ESP32 Arduino
- Topic: ESP32, Arduino IDE, Parallel Tasks
- Replies: 1
- Views: 2621
ESP32, Arduino IDE, Parallel Tasks
I have a sketch that - connects to WiFi - connects to MQTT - reads data from a BME688 sensor - sends that data to a server This works, but I am having issues maintaining sensor quality, which degrades on timeouts, say when MQTT needs to re-connect. I am wondering about assigning the sensor read oper...
- Thu Jan 13, 2022 9:20 am
- Forum: Hardware
- Topic: ESP-WROOM-32 - 3.3v rail voltage excursion
- Replies: 3
- Views: 4288
Re: ESP-WROOM-32 - 3.3v rail voltage excursion
This is a graph of an ESP-WROOM-32 3.3V rail monitored by an ADC connected to another ESP32, so that the device under test has no load, or capacitors added. This appears to show that the voltage excursions are present even when not powering other devices although they are much lower in magnitude. ht...
- Thu Jan 13, 2022 1:30 am
- Forum: Hardware
- Topic: ESP-WROOM-32 - 3.3v rail voltage excursion
- Replies: 3
- Views: 4288
Re: ESP-WROOM-32 - 3.3v rail voltage excursion
For measurement, I take the 3.3V rail to a voltage divider, just so that this is moved away from the top end of the ADC range a little. The calculations back-out the impact of the voltage divider to give the 3.3V rail voltage, which seems to average about 3.265V with these three external boards powe...
- Thu Jan 13, 2022 12:39 am
- Forum: Hardware
- Topic: ESP-WROOM-32 - 3.3v rail voltage excursion
- Replies: 3
- Views: 4288
ESP-WROOM-32 - 3.3v rail voltage excursion
I have a few of these ESP-WROOM-32 devices (38 pin). I am powering the following from the 3.3V supply which should not, I think, cause any issues in terms of supply capability. - BME280 - 1115 ADC - 9808 temperature sensor The 3.3V rail has parallel 0.1u and 10u capacitors to ground. The ESP-WROOM-3...
- Fri Dec 24, 2021 3:15 pm
- Forum: ESP32 Arduino
- Topic: MCP9808 Temperature Reading Incorrect
- Replies: 1
- Views: 4801
Re: MCP9808 Temperature Reading Incorrect
For testing, I bought another couple of these and they both worked out of the box.
Same manufacturer chip ID reported in testing. The new ones I got have a different PCB layout.
I'm guessing that quite simply the first board I got was faulty.
Same manufacturer chip ID reported in testing. The new ones I got have a different PCB layout.
I'm guessing that quite simply the first board I got was faulty.
- Thu Dec 23, 2021 3:17 pm
- Forum: ESP32 Arduino
- Topic: Auto Reconnect to Station without disconnecting AP
- Replies: 3
- Views: 9817
Re: Auto Reconnect to Station without disconnecting AP
I don't have a definitive answer, but a couple of thoughts which might stimulate some debate ... Have you tried the options "WiFi.setAutoReconnect(true) and WiFi.persistent(true) to see if that will force auto-reconnect? Did WiFi.reconnect() not work? Was that why you're looking at WiFi.disconnect()...
- Wed Dec 22, 2021 8:25 pm
- Forum: ESP32 Arduino
- Topic: MCP9808 Temperature Reading Incorrect
- Replies: 1
- Views: 4801
MCP9808 Temperature Reading Incorrect
Hello I am having problems getting the correct temperature from a MCP9808 I am using the Arduino IDE and have tried both the MCP9808_RT and the Adafruit MCP9808 Libraries In all cases, the temperature returned is -34 degC while the board is at room temperature. Having failed to get this working, I t...