So, does anyone have any code, or know of a tutorial, for sending serial data from one Arduino to a second Arduino, using hm-10 BLE modules? and if you do, will i need a serial adapter?
I have not used an HM-10 but I do not think an HM-10 can receive from 4/5 other HM-10s.
5 Nano/ sensor systems on the bike, and communicate to a Mega connected via USB to my laptop/ the serial monitor (if needed).
If the goal is to get IMU data to a PC without wires, I have used BLE devices that send data to a Raspberry Pi 3 running node.js.
node.js with the noble BLE library supports BLE central and peripheral on Windows, Mac, and Linux. The server must have BLE hardware which could be as simple a USB Bluetooth 4.0 or higher gadget.
For example, this node.js package supports the HM-10.
ESP8266 WiFi is a much faster option if BLE is too slow.