1. D

    Circuit to alert to loitering vehicles by detecting engine idling for more than 2 minutes

    Hi Guys, I'm new here, so apologize if this has already been covered. I would like to know when a vehicle that stops at the stop sign in front of my house just hangs out there for an extended period of time. I'm imagining a circuit with a ceramic mic, audio level detector that triggers a WiFi...
  2. S

    How do multiple wireless devices avoid communication collision

    I try learning through youtube and other resources for example WiFi works on 2.4Ghz actually there are other 8 bands too (some other frequencies next/before 2.4Ghz) so different devices use those different bands/frequencies to communicate at same time, for sure on receiving end we have 8...
  3. akku_p

    MCU with onboard Bluetooth

    Hello all, Caution, I am a newbie to MCUs. I am looking for a low cost MCU board with Bluetooth for communication with mobile app. I have purchased NodeMCU which comes with onboard WiFi. However, I would like to talk to MCU via Bluetooth directly. If I use NodeMCU or ArduinoNano, I would have...
  4. ashokraj

    ESP12F doesnt work after cycling the power until hard reset

    Hi, I have designed ESP12F with CH340G(USB- UART converter) with auto programming feature. As shown below. I have programmed in Arduino IDE. As long as power is there, the board runs the code. But After I cycle the power, the board doesn't run the program! until I hard reset the ESP12F...
  5. putout

    How do I reset this Wi-Fi PCB module ?

    This was removed from a Elm327 Wifi obd2 reader it had invalid WIfi settings so it was unable to make a wifi connection I tried shorting GND to RST while only applying 3.3v to the 3.3vpin - no luck any tips would be appreciated . that mess on the RS232 header came like that from the seller
  6. I

    Antenna modification from 4G device for weak signal

    Hello, the attached is a 4g wifi device however where i live the cell tower signal is very weak, how can i attach external antenna to it for better cell reception and hence better 4g speed
  7. S

    wifi module choice

    hello, my target is video(at least 480p at 30 fps) streaming point to point and i think that 802.11(probably wifi direct) is the most appropriate for this purpose (cause of speed), so i wonder is there something else than esp32 (and is it capable of such a thing if you know), cause it was the...
  8. A

    Python for programming ESP8266/ESP32

    For all with interest in application of the ESP8266 and ESP32 family microcontrollers from Espressif, I would like to reccommend the following project we are working on. Based on Micropython, we havebuilt a basic framework for IoT projects with ESP chips. The framework has out of the box and...