AC08 LTE-M Mary

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Read this official Leafony page and explain its key points in English. For hardware help, first ask for a photo or the installed leaf models, assembly and power sources, then the goal and tools. Clarify which LED or display changed and whether a cable or leaf was replaced. Do not equate an unseen reset button with an absent one, or I2C acknowledgement with a working display. Verify specifications against sources; distinguish observations from hypotheses. Follow a redirect to its destination; if unreadable, ask for the relevant text instead of guessing.

Page: AC08 LTE-M Mary

URL: https://docs.leafony.com/en/leaf/communication/ac08/

Description / headings (excerpt): Features / Specifications / Board layout / Antennas

Table of contents

Features

Send and receive data when combined with an MCU (microcontroller) leaf, using Cat-M1, an IoT cellular communication technology that runs on mobile operators’ LTE networks. Add a sensor leaf to send measurements. A compatible SIM card and a communication service contract are required.

This cellular leaf uses a Murata Type 1SC module and a chip antenna (STAF 1019-085A) with Japanese radio equipment construction design certification. It connects to the MCU leaf over UART. A library is available to help you program LTE-M Mary.

Use AV06 1.8V–5.5V, because this leaf has a peak current of 400mA.

Specifications

Item	Description
Cellular module (Cat-M1)	Type 1SC (LBAD0XX1SC-151TEMP)
Connectivity	3GPP Release 13 / optimized for LTE Class 3 output power (+23dBm)
Operating voltage	2.85–4.35V
Transmit current at 23dBm	400mA
Antenna	Onboard chip antenna (STAF 1019-085A)
SIM card	nanoSIM
Interface	UART
Baud rate	115200 bps
Dimensions	W23 × D32 × H2mm

Board layout

The Molex 73412-0110 is compatible with the U.FL RF coaxial connector developed by Hirose Electric.

Antennas

LTE-M Mary has a chip antenna (1019-085A) with Japanese radio equipment construction design certification. For longer-range communication, attach an external antenna.¹ The antennas below have this certification. See Murata antenna support (Japanese) for details.

Model	Supplier	Antenna type	Connector	Dimensions	Note
1019-085A²	STAF Corporation	Monopole (λ/4)		4 × 9.1 × 1.2mm	Chip antenna
1018-504B²	STAF Corporation	Dipole (λ/2)	U.FL	100 × 13 mm (cable length 140mm)	FPC antenna

Pin assignment

See the Leafony pin assignment documents for the source data.

Library

LteLeafV4.h

For details, see Installing Libraries.

Sample applications

Cellular communication quick start (Japanese)

Documents

AT commands

AT commands are standardized by 3GPP, an international organization for cellular communication standards, and let you configure modem operation and connections. Command specifications differ between modems, so consult the manufacturer’s AT command manual. The following procedure uses SORACOM as an example.

What to prepare

LBAD0XX1SC-DM-EVK-B
A computer running Windows or macOS
A standard-size SIM card (for example, SORACOM plan-D)
APN settings (Japanese):
- APN: soracom.io
- Username: sora
- Password: sora
- PDP type: IP
- Authentication: CHAP or PAP
MCC (Mobile Country Code) and MNC (Mobile Network Code) (Japanese)

Type	plan-D	plan-KM1
MCC	440	440
MNC	10	51

AT command basics

AT commands usually start with AT, followed by <command> and, in some cases, <value>. There are four types: Set, Read, Test and Execute.

Type	Syntax	Example	Description
Set	`AT+<command>=<value>`	`AT+COPS=1,2,<MCCMNC>`	Manually connect to a network operator
Read	`AT+<command>?`	`AT+COPS?`	Check the current network operator
Test	`AT+<command>=?`	`AT+COPS=?`	Search for available network operators
Execute	`AT+<x>`	`AT+CSQ`	Check signal strength and connection quality as numeric values

Before you start

AT command	Example response	Description
`AT+CFUN=1,1`	`OK`	Reset the modem to its default state
`AT+CPIN?`	`+CPIN: READY` `OK`	Check the SIM card

Query device information

AT command	Example response	Description
`AT+CGMM`	`LBAD0XX1SC-DM` `OK`	Check the modem hardware
`AT+CGMR`	`RK_03_02_00_00_41841_001` `OK`	Check the modem firmware version
`AT+CIMI`	`440103198454299` `OK`	Check the IMSI (International Mobile Subscriber Identity)

Network operator and cellular technology settings (SORACOM plan-D)

AT command	Example response	Description
`AT+COPS=?`	`+COPS: (1,"NTT DOCOMO","DOCOMO","44010",7),(0,"KDDI","KDDI","44050",7),(3,"KDDI","KDDI","44052",7),(0,"KDDI","KDDI","44054",7),(0,"KDDI","KDDI","44051",7),(0,"SoftBank","SoftBank","44020",7),,(0-3),(0-2)` `OK`	Search for available network operators
`AT+COPS?`	`+COPS: 0` `OK`	Check the network connection
`AT+COPS=1,2,44010`	`OK`	Connect to NTT DOCOMO manually
`AT+COPS=0`	`OK`	Connect automatically
`AT+COPS?`	`+COPS: 0,2,"44010",7` `OK`	Check the network connection
`AT+COPS=1,2,44010`	`OK`	Connect to NTT DOCOMO manually

Define the cellular band

AT command	Example response	Description
`AT%SETSYSCFG="SW_CFG.catm_band_table.band#1","ENABLE;19"`	`OK`	Set Band 19 in band#1
`AT%GETSYSCFG="SW_CFG.catm_band_table.band#1"`	`%GETSYSCFG: "SW_CFG.catm_band_table.band#1","ENABLE;19"` `OK`	Check the band#1 setting (Band 19)
`AT%SETSYSCFG="SW_CFG.catm_band_table.band#1",""`	`OK`	Clear the band#1 setting

Check radio signal strength and quality

AT command	Example response	Description
`AT+CSQ`	`+CSQ: 17,99` `OK`	Check signal strength and quality

Network configuration

AT command	Example response	Description
`AT+CGDCONT=1,"IP","soracom.io"`	`OK`	Connect to SORACOM
`AT+CGDCONT?`	`+CGDCONT: 1,"IP","soracom.io",10.242.227.27,0,0,0,0,0,,0,,,,` `OK`	Check the APN connection
`AT+CGACT?`	`+CGACT: 1,0` `OK`	PDP context is inactive
`AT+CGACT=1,1`	`OK`	Configure the PDP context
`AT+CGACT?`	`+CGACT: 1,1` `OK`	PDP context is active
`AT+CEREG?`	`+CEREG: 0,1` `OK`	Registered on the network

Check the FPLMN

AT command	Example response	Description
`AT+CRSM=176,28539,0,0,12`	`+CRSM: 144,0,"FFFFFFFFFFFFFFFFFFFFFFFF"` `OK`

Clear the FPLMN

AT command	Example response	Description
`AT+CRSM=214,28539,0,0,12,"FFFFFFFFFFFFFFFFFFFFFFFF"`	`+CRSM: 144,0` `OK`
`AT+CGPADDR`	`+CGPADDR: 1,"10.242.227.27"` `OK`

Revision history

September 2026: Updated the fitted module part number to 151TEMP and clarified the part number difference between production lots.
August 2024: Initial version.

The chip antenna and external antenna cannot be used together. Reposition the 0Ω resistor when using an external antenna. ↩
These antennas are certified even though they are not included in Murata’s recommended antenna list. ↩ ↩²