|Item model number||3-01-1287|
|Item Weight||1.76 ounces|
|Package Dimensions||4.3 x 2.2 x 0.7 inches|
HiLetgo® ESP-WROOM-32 ESP32 ESP-32S Development Board 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller Processor Integrated with Antenna RF AMP Filter AP STA for Arduino IDE
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- Highly Rated: More than 80% 4 star and 5 star reviews
- Popular Item: Popular with customers shopping for "esp32"
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- 2.4GHz Dual Mode WiFi + Bluetooth Development Board
- Ultra-Low power consumption, works perfectly with the Arduino IDE
- Support LWIP protocol, Freertos
- SupportThree Modes: AP, STA, and AP+STA
- ESP32 is a safe, reliable, and scalable to a variety of applications
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HiLetgo ESP-WROOM-32 ESP32 ESP-32S Development Board 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller
The ESP32 integrated with Antenna switches, RF Balun, power amplifiers, low-noise amplifiers, filters, and management modules, and the entire solution occupies the least area of PCB. 2.4 GHz Wi-Fi plus Bluetooth dual-mode chip, with TSMC Ultra-low power consumption 40nm technology, power dissipation performance and RF performance is the best, safe and reliable, easy to extend to a variety of applications.
Reference links of ESP32 at below:
1 * ESP-WROOM-32 ESP32 ESP-32S Development Board
If it cann't get bluetooth working?
Using Node32s as the Board selection. To reference GPIO pins in code use just the number, for example "digitalWrite(13, HIGH)" sets GPIO13 high. The built-in LED to GPIO2.
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This is a well made device. There are nits, but for the price, I believe it is a good deal.
You can use Arduino IDE and framework, or the ESP-IDF framework, or even mix and match a little.
It's using silicon revision 1 (see below).
* It will flash without having to press any buttons; I suspect this is done using the de-facto standard of pulling certain serial lines low.
* It has revision 1 of the chip, as of my delivery date of Jul 12, 2017.
* It seems to be well made, in that all the solder joints are clean, have sufficient solder, and no flux residue. The circuit board is black, which is both a plus and a minus: it is hard to trace wires, but it's unlikely you'll need to do this anyway.
* The built-in antenna does not overhang the main PCB, unlike some others I've seen. As far as I can tell, the circuit board is empty under this antenna, but the pins are somewhat close to it. This may affect its functionality, but I have no way to measure this.
* The pinout is only printed on the bottom of the board, which makes it totally useless once inserted into a breadboard.
* The bottom silk screen with the pinout and other information is somewhat blurry, although readable.
* There is no external WiFi antenna connector, nor a place to solder a u.fl or better yet, RP-SMA.
* The built in voltage regulator is a standard linear model, which will limit somewhat the low power modes to actual low power.
* There is a built-in LED that indicates power, which also limits the usefulness of the low power modes. It can be removed.
* It uses a USB chip other than a more standard FTDI. As there are drivers available for every major OS, this is only a slight issue, but I'm not used to having to install device drivers for a Mac.
I downloaded the Arduino library from GitHub /espressif/arduino-esp32, copied the library into Arduino/hardware/espressif/esp32/, and then ran a script in the /tools folder to download a binary blob from Espressif. As stated by Joey, I set the board to Node32s in the IDE and got the correct pinout, but I suspect most of the choices will work, because this board follows the standard Devkit pinout. There is a nice picture at the bottom of the README on GitHub.
There are 2 buttons. Just like the NodeMCU, one button works as Reset and the other is tied to GPIO0 for bootloading or custom functions. There is a blue LED attached to GPIO2. There is also a red LED that I believe is just a power indicator.
After about 30 minutes setup I was off and running. Currently running a burn in test, requesting a page repeatedly. No errors and connects to the network fine so the fundamentals of this board appear good after about 18 hrs of continuous operation.
In the past I spent a lot of time trying to interface one of the tiny ESP8266 modules with an Arduino, even with logic level converters in place and things communicating the whole thing feels rickety. The all in one ESP8266 modules are nicer but lack GPIO for any heavy lifting. GPIO wise the ESP32 gets closer to an Arduino UNO board than the ESP8266. Great for remote sensor monitoring/logging, display panels.
The Adafruit HUZZAH32 boards are a little more feature rich and more expensive. Unless you use the specific features like battery charging these boards will be a dominant player IoT tool kit, either way a great addition.
Compact design has nothing sticking out over the board and does allow the outer pins on a breadboard to be used. However, you do lose space for the pinout markings on top of the module, instead they are on the bottom. It's also a little odd that GPIO6-11 are broken out, as they cannot be used.
Most recent customer reviews
Able to monitor the output of the default firmware but unable to upload
But it fits on a breadboard and the USB...Read more