ESP-WROOM-5C is a Side-Mounted ESP8285 WiFi Module

You’d think by now we’d have enough ESP8266 or ESP8285 WiFi modules, but based on an FCC listing, we now know that Espressif Systems has been working on another ESP8285 WiFi module – ESP-WROOM-5C – designed to be side-mounted.

ESP-WROOM-5CESP-WROOM-5C specifications:

  • SoC – Espressif Systems ESP8285
  • Wi-Fi
    • 802.11 b/g/n WiFi 4 @ 2412 MHz ~2462 MHz;
    • Station/SoftAP/SoftAP + Station modes
    • WPA/WPA2 security with EP/TKIP/AES encryption
    • PCB antenna
  • Peripheral interface
    • I2C/IR Remote Control
    • GPIO/PWM
  • Operating voltage – 2.7V ~ 3.6V
  • Operating current – Average: 80 mA
  • Minimum current delivered by power supply – 500 mA
  • Dimensions – 19 x 16 x 3.2 mm
  • Temperature Range – -40°C ~ 105°C
  • Reliability Tests – HTOL/HTSL/uHAST/TCT/ESD

The module supports firmware upgrade over UART or OTA (Over-The-Air). Software development can be done with the IDF SDK for custom firmware, but “Cloud Server development” is also possible, and an Android/iOS app can be provided for user configuration.

There isn’t any other public information about ESP-WROOM-5C module at this stage other than on the FCC page, where you’ll find the user manual (PDF) for more technical details.

Thanks to Mikkel for the tip

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2 years ago

I don’t understand, what do you mean by side-mounted?

2 years ago

The note at the bottom of table 2-1 on page 6 of the PDF says:-

Pins 1 ~ 8 are pluggable pads that can be welded to your own development board, while pins 9 ~ 15 are reserved for testing and cannot be welded to the development board.

…which clears up things a bit. There’s also a recommended pad layout (for the motherboard) later in the document.

2 years ago

To get a smaller footprint on the PCB and to (probably) increase the wifi performance the module is mounted vertically on the PCB. Afaik fiddling the module into the PCB and solder it can only be done by hand. So they are targeting low volume products..?
Or will they try to get into the OEM iot-cloud-market where they sell preprogrammed ESPs, cloud hosting and the apps (like ipowerful or smart life) ?

And here is a picture of such side mounted module:comment image

2 years ago

It’s confusing. The user manual PDF suggests the board should be plugged in to a mainboard via the 4 sticking-out edge pads (actually 8 pads, double sided) i.e. the image in this article needs rotated 90 degrees, whereas your linked image shows the board connected via the 6 ‘test pads’ along the other edge. Weird.

2 years ago

I don’t think the image is of exactly this module.

2 years ago

The six pads is for programming the module, maybe with pogo pins. The eight pads is for using the module after it programmed, maybe by plugging it like computer RAM or old game cartridge.

2 years ago

I guess that it is supposed to be plugged inside a socket. This is great for products with optional WiFi.