DSD TECH HM-18 CC2640R2F Bluetooth 5.0 BLE Module Compatible with HM-10 for Arduino

Lo programé con Arduino y lo pude conectar con Android e iOS. Importante, no pude cambiar la contraseña del módulo que es del 1 al 9.Es de buena construcción, los pines son duros, y la carcasa de plástico que trae le da más resistencia.Estoy muy contento con ese modulo

The module works great for basic communication to peripherals (e.g., Arduino), and, you can use the on board I/O via ATT mode (see instruction sheet), but, it would be very nice if the DSD Tech software was further developed to support the Relay tab (which apparently now only supports their BLE relay module), or create a new PIO tab, so you could control output of 4 of the PIO pins...probably not a lot of need for it because you would need to solder wires to the PIO pins on the module to effect, but, some of us would like that feature!

The app is pretty good and the module works well. Use 3.3VDC for VCC. The Datasheets isn’t very professional. The datasheet looks like a college undergrad wrote it at 2am, but it works. The module itself is great.

I really needed this BLE module to pair and stay paired with my Android 11 phone but it will not. Tried all the associated settings and made no difference. It would pair momentarily, reporting OK Conn then seconds later it would lose the pairing and report OK Lost. Big waste of time. Will be returning them to Amazon.

Trying to build a Bluetooth connected app to control a car horn device using MIT App Inventor. Took a bit of trial and error but think I finally have the fix using this module and/or the DSD Tech HC-06 module to control a countdown sounding device used to start sailboat races.Really wanted to be able to use the DSD Tech 2-relay module but couldn't find a way to send the on off commands to the individual relays on the two relay module they offer. The DSD Tech Bluetooth app is not adaptable as far as I could tell for use with a separate app nor could I figure out how to use the unusual actuation codes provided in the relay instructions so I'm returning to using this module which will allow use of numeric Strings to control two circuits by way of an ATTiny85 module and relay.

This device is supposed to be BT Version 5.0, but apparently it's missing some protocols, where I couldn't get my device (BT Version 4.2) to connect to it. It does connect to my Android phone.I tried contacting the manufacturer, which was SLOW and confusing. I wasn't impressed with their support.

after numerous emails back and forth it was revealed that the device does not read/write/notifyinstead it only does read/notifyi bought this specifically for the write feature. I ended up buying an esp32 WROOM device from hiLetsgo which did what I needed.

Not much to say. Module worked for a minute then nothing. Software that you have to download from their site doesn't work either. Tech support doesn't help either. They say very patient.......Still waiting. Buyer beware