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.

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

28 · 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.