How do I connect the eS-WiFi UART to my host microcontroller?

The module only require 6 wires to use the UART: TX, RX, Power, Ground and we recommend you also connect Reset and wake-up to your host.

What interfaces do the eS-WiFi modules support?

You can use AT Commands over the UART, SPI or USB HID interface to send commands and send/receive data.

Is the eS-WiFi module’s SPI interface slave or master?

The eS-WiFi SPI interface is a slave.

Do the eS-WiFi L44 modules support SPI mode? What pins should I use to connect SPI?

Yes, the eS-WiFi modules support SPI.

The correct pins to use for the host I/O are the ADC1-ADC4 pins.

  • SPI_SCK=ADC2=Pin11
  • SPI_MISO=ADC3=Pin10
  • SPI_MOSI=ADC4=Pin9
  • SPI_NSS=ADC1=Pin12

Serial Peripheral Interface eS WiFi L44 module

How do I connect the eS-Wifi module to my host microprocessor via UART?

UART

Connect TX on the Module to RX on your Microcontroller
Connect RX on the Module to TX on your Microcontroller