Browsed by
Category: ESP32-Cam

Water Level Monitoring with the ESP32-Cam Module

Water Level Monitoring with the ESP32-Cam Module

In this post the ESP32-Cam module will be used to monitor water levels using a HC-SR04 ultrasonic ranging module . The readings will be published to a MQTT broker through the WiFi network. Node-Red will be interfaced with the broker and used to process and display the readings in its WebUI. Node-Red will also operate a pump once thresholds are reached through the broker. Video from the ESP32-Cam will be gathered by Node-Red and included in its WebUI. This project…

Read More Read More

GPS Mapping with Viking using ESP-Now and GPSd

GPS Mapping with Viking using ESP-Now and GPSd

The last post (https://www.cloudacm.com/?p=4185) ended with a video titled “Decoding GPS using an RTL SDR Receiver” that was posted August of 2020. The 2 software requirements for this method are RTKLIB (https://www.rtklib.com/rtklib_tutorial.htm) and GNSS-SDRLIB (https://github.com/taroz/GNSS-SDRLIB). The video mentioned that Google Maps didn’t display, however there was mention in comments about an API requirement. The video did introduce the option to port the output to another mapping program, one of which is Viking. On a side note, I found this video…

Read More Read More

Radio Frequency Visualization

Radio Frequency Visualization

This post will revisit a topic which has been covered in earlier posts, but with some enhancements.  This earlier post used python to visualize a radio sweep, https://www.cloudacm.com/?p=3209. The method was specific to the SDR hardware and the rtl_power command to generate a dataset that was then processed with python to generate a plot.  This post will expand on the visualization by using python to generate varied plot types to help in understanding the radio signals observed.  The previous post…

Read More Read More