Gravity: Offline Language Learning Voice Recognition Sensor for micro:bit/Arduino / ESP32 - I2C & UART

Spectacular performance for a few dollars. EASY to use and program. Lots of examples. Try pairing with X10 or other home automation for a budget friendly smart house WITHOUT the security nightmare of internet connection. Pro tip - You have to speak the phrases verbatim. The computer can't guess what you mean and you wouldn't want that if it guessed wrong and turned on sprinklers whan the inlaws are over for a BBQ.

[Software Setup - Arduino IDE]1.) Download : DFRobot_DF2301Q_Master from Github2.) Sketch -> Include Library -> Add .zip Library -> choose the DFRobot zip3.) File -> Examples -> DFRobot_DF2301Q -> i2c4.) Compile and Upload to Programmed Arduino before you make any connections.[Connections]1.) Make sure switches on DFRobot Voice board are set to: i2c and spkr12.) Make following connections from Voice board to Arduino: vcc -> 5v, gnd -> gnd, DT (green wire) -> A4, C/R (blue wire) to A5.3.) From a different Arduino (Dumb Arduino as opposed to Programmed Arduino): Dumb Arduino 5v -> VIN Programmed Arduino. Dumb Arduino GND -> GND Programmed Arduino. Any 5v power source should work as an enhancement, but this did work for me. Also, I'm not sure about the long term consequences of this power enhancement (on the Programmed Arduino). So far non for me. However, it might fry the programmed Arduino over time. You have been warned.4.) Dumb Arduino can be plugged into a power strip USB adapter - not PC.5.) Programmed Arduino plugged into COM port of PC.6.) Open Serial Monitor in Arduino IDE to see command numbers after you speak the commands.7.) The red light should be on, on the DFRobot sound board. Wait 15 seconds and then say: Hello Robot.8.) You can issue other commands after the Hello Robot. DFRobot has a wiki of all pre-programmed commands and 17 user-generated commands.Good Luck! JD3.

Works surprisingly well. I'm using it with an ESP32. I was particularly impressed with the fact that I can record a command with my male voice and the device will recognize that same command from my wife's voice.I do wish it had an external microphone connector instead of an external speaker connector.Like others have said, it does seem to stop responding to the wake command about an hour after booting up. It's easy enough to just have the ESP32 reboot it periodically but it would be better to just not.All in all, if you're making a robot and considering this, buy it, you won't regert it.

These worked great on a homemade project to build a 3D dog replica that could recognize voice patterns

Amazon sent a replacement for the first defective board - it started loud and in a second was not loud enough and nothing I did helped the situation. When the replacement came, it was dead on arrival. Just the red LED was on and the blue LED never came on! The voice wasn't working at all, so I'm sending this board back for a refund. I have seen in our club this unit working, so I know it is great with Arduino or other boards (I've seen used on Arduino only).

I ordered one of these modules and was very impressed with its ability to recognize learned words (even at a distance). The time to respond to a matched word with an output signal is also the best I've seen. Needless to say I was excited to have found a solution to a project I was working on.After extended testing I noticed that the module would not wake up when the wakeup word was issued. If the module was power cycled, it would start working normal again. This seemed to occur after being powered up for a length of time (30mins- 12 hours)... Thinking this was a defective module, I ordered two more and continued testing. I find the problem exists in all the modules. I tried multiple things including removing background noise, extreme power filtering at 3.3v 4v and 5v, but the (no wakeup) problem still existed. I also found little bugs such as not being able to re-record the first deleted command word with the same word. It would be nice to have a reset to factory defaults option also. I looked online and found others that have had similar issues, but also found posts that said it works great, so I'm at a loss... anyway I'm now looking or another solution. Hopefully they fix these issues because this is a great little module.

I built a voice activated remote for a medical chair using this along with an Arduino Nano. The board continually malfunctions, forgets its commands, or just rambles on its own. It even gets triggered by my farts!! I plan on redesigning the system using Alexa’s excellent VR system.

funcionó perfectamente para Anunciar palabras y Frases para Sordos ... mediante un panel de luces Leds en una matriz.