host interface – Inventek Systems

Which host micro controller is recommended?

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Any controller that has a UART or SPI interface can be connected to the eS WiFi module.

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

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

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