IoT NODE | ESPNOW Based Project 

hackster.io

Topics: code, protocol, IoT ESP, Network Tech 

Transcript Excerpt

The most numerous type of device in the IoT can be referred to as the node. These are all the exciting devices that are providing sensor data, or devices that are being controlled from the cloud. This means things like door locks, security sensors, temperature sensors, and more. Without further ado, let’s begin learning how to utilise ESP in IoT projects in case consumers want secure communication between the ESP8266. ESP is now a wireless communication protocol that can send packets and was created by expressive. This protocol makes it simple for various devices to connect with one another and efficiently transmit information. The 2.4 GHz wireless connection, which is frequently used with wireless mice, is comparable to this protocol. As a result, pairing the devices is required before interacting. This indicates that after the devices are paired with one another, the connection is secure. In other words, when users resume after an abrupt shutdown or reset of one of the ESPs, the connection is instantly restored. Altium Designer was used by specialists to create a unique PCB for this project. The ESP8266 power regulator, LM7805 relay, SMD resistor and capacitor, as well as a few pin headers for connecting the DHT 11 and serial connection, were all utilized in this scheme by professionals. Of course, the release circuit has an issue since the experts were lazy and made it too easy, but now that the experts have finished the PCB, let’s look at the project. Two separate code are used by experts, one for the master node and the other to be uploaded onto the slave nodes. If users have any trouble setting up the ESPnu project, experts drew up a full instructional blog about it and utilized the DHT 11 data on the ESPnow structure data. If users have any questions, experts should insert the mac address of the master node in this code, which is the code for the slave node. To manage the data that the master node is getting, experts should define boards id in the code for the master node. Keep in mind that users should use different ids for each slave node, and experts set up an oled display with an i2c interface in the master node if users are using the ESP826601 version. As users are aware, ESPnow has a number of different scenarios for transmitting and receiving data. Let’s explain the scenario that experts used in this project. If something goes wrong, this power just safeguards the link between the nodes; once the troubled node is back up, no physical action is required. 

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