JD Allen
  • Member for 3 years, 8 months
  • Last seen more than 1 year ago
  • Parker, TX, USA
IoT device's soft access point module dropping out at trade show
Accepted answer
6 votes

Having been to many a trade show, there are a few things to set when on the expo floor: Hide the AP name. Most devices won't try and connect if they can't see the AP name. Look for a channel that is ...

View answer
Network type for streaming from RPi to several ESP8266 modules
Accepted answer
5 votes

MQTT should be more than fast enough for your architecture, given a decent WiFi network. I run about 30 sensors (ESP8266, Feather MO, Arduino Uno, etc.) all using MQTT back to a Mosquitto Broker ...

View answer
What are affordable solutions to air quality monitoring system?
5 votes

Adafruit has a Volatile Organic Componds (VOC) / CO2 sensor built to monitor air quality (https://www.adafruit.com/product/3566 $19.95 USD) which sounds like would fit your requirements. Its not as ...

View answer
IoT framework / dashboard with time lapsing capabilities and reusable device definitions?
4 votes

I've done something similar with my pool. I have a Temp/Ph/ORP sensor package that sits by the pool with its sensors in the water. I send the data over WiFi and MQTT to a Node.JS/Express program ...

View answer
MQTT protocol between RPi and sim808
Accepted answer
4 votes

The Sim808 is a cellular GPRS data device (https://www.adafruit.com/product/2637), so getting data from it to a Raspberry Pi will depend on limits your wireless carrier has on the service that you ...

View answer
DS18B20 Oscillating Rapidly
4 votes

Keep in mind that the value returned from the DS18B20 is depending on the voltage received. If this voltage has fluctuations, then your readings are going to flux as well. I've seen mine go from 20C ...

View answer
Multiple agents authentication to MQTT
3 votes

Never let "anyone" add stuff via MQTT to a database ;) Once bad data gets into the database, any results from your analysis programs will be skewed at best, or down right wrong at worse. Any time ...

View answer
Error: 'NN_DIGIT' does not name a type, while using google-cloud-iot-arduino
3 votes

The title of your question has one issue, but the text of your message has another...you might want to either change the title, or create a new question ;) As for the error in your text: Is this ...

View answer
Does an Internet of Things device need to directly connect to the Internet, or can they use alternative protocols like Bluetooth or ZigBee?
3 votes

Remember: "IoT" is just a label. Depending on who you are talking to, just about anything computer related these days can end up with the IoT label. Remember that DDoS attack awhile back that made ...

View answer
How can I write bytes to BH1750 via line buffer IC (ESP32)?
2 votes

I2C is a "bus", as in bi-directional. You signal the device at its address that you want some data from it, and it sends it back. Now I'm no electrical engineer graduate, but the 74F244 chips looks ...

View answer
Local and distant MQTT communication
2 votes

You could setup something like Node-RED that would collect the payloads from ESP8266 sensors, and turn around and send out the same payloads using a different topic. I do this myself on my home ...

View answer