Spark Logic

EMW3165 embedded Wi-Fi module connection guide

EMW3165 embedded Wi-Fi module EMW3165 family, 41 contacts wiring guide with power, signal assignments, and bench checks.

EMW3165 family, 41 contacts

41 contacts Current package

MXCHIP · Two 1 mm-pitch rows of 20 and 21 contacts.

Module with IPEX external antenna connector.

Query the installed AT firmware

Required

Wire all supply and ground contacts and the crossed user UART. Use a 3.3 V serial adapter. For normal startup leave BOOT and STATUS open or use the manufacturer reference pull-ups.

  • 3.3 V supply
    • VBAT (10)
    • VDD (39)
    • VDD (40)
    • Regulated 3.3 V
    • C1.1
    • C2.1
  • Ground
    • GND (20)
    • GND (21)
    • Supply return
    • Host ground
    • C1.2
    • C2.2
  • Host to module
    • PA10 (29)
    • Host UART TX
  • Module to host
    • PB6 (30)
    • Host UART RX
C1 100 nF at VBAT between 3.3 V supply and Ground3.3 V supplyC1 100 nF at VBATGround
C2 10 µF at VDD between 3.3 V supply and Ground3.3 V supplyC2 10 µF at VDDGround

Bench checks

  • Check 3.3 V at all three power pads during startup. Keep the EMW3165 antenna clearance from Figure 4.
  • Start at 115200 bit/s, 8N1. Send AT+FWVER? followed by CR in AT mode and check for a firmware version response.
  • If the module is in transparent mode, use the documented +++ transition before querying. The debug UART on pads 8 and 12 is a separate port.

MXCHIP EMW3165 DS0007C v2.2, Figure 5 and Table 1; MXCHIP AT command firmware guide, Modes and Factory settings.

EMW3165 family, 41 contacts wiring map

Select a contact to inspect it.

EMW3165 family, 41 contacts
Figure 3 orientation with the PCB antenna area at left. Pad 1 is at the right end of the upper row and ANT (41) is at the left end of the lower row. Scroll the map to reach all contacts.
Selected pin details

22 · NC

No connection · NC / reserved

No application connection. Leave open.

MXCHIP EMW3165 DS0007C v2.2, Figure 3 and Table 1

Electrical limits · Pin in the reference

Models and documents

The 41-contact layout follows the MXCHIP DS0007C v2.2 module drawing. The EMW3165 uses a PCB antenna and EMW3165-E has an IPEX connector. The UART test assumes the vendor AT firmware.

EMW3165
Default module with PCB antenna.
EMW3165-E
Module with IPEX external antenna connector.