Scannex N4X User manual

N4X Reference Manual
Scannex Electronics Limited
2023-03-10

Scannex Electronics Ltd, UK
t: [phone]
https://www.scannex.co.uk
[email protected]
Scannex LLC, USA
t: 1-866-BUFFER (1-866-428-3337)
https://www.scannex.com
[email protected]
Date Author Release
2023-03-10 MP Initial document
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
Preface | 1

Table of Contents
N4X Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê4
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê4
Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê4
Version History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê6
Upgrading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê7
Connections & Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê8
PCB Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê8
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê9
DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê9
Output Drive Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê9
Magnet Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê9
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê10
COM1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê10
POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê10
Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê11
Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê11
Internal Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê12
ip.buffer COM Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê12
BTN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê12
Expansion and Debug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê12
QUICC/I2C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê12
Manufacturing Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê14
PROG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê14
TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê14
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê15
Input Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê15
Power Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê15
Wakeup Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê15
Lua API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê16
pcb : Power Control Board API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê16
pcb.user : Access User Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê24
pcb : Helper API Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê25
Internal Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê30
Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê30
SecondsPowered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê31
SecondsMain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê31
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
2 | Table of Contents

WakeupCounter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê31
WakeupInterval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê31
WakeupFlags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê31
WakeupFlag Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê32
WakeupInputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê32
LedBits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê33
Writing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê33
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê33
InputVoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê34
PowerTimer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê34
WakeupTime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê35
PowerControl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê35
Bit field. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê35
ControllerStatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê35
Controller Status Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê36
Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê36
Command List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê36
Variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê37
Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê37
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê38
EU/UK Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê38
European Union Waste Electrical and Electronic Equipment (WEEE) Statement. . . . . . . . . . . . . . . Ê38
UK Users. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê38
European Users (outside the UK). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê38
Manufacturer/Responsible Party. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê38
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ê39
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
Table of Contents | 3

N4X Overview
Description
The ip.buffer N4X combines the ip.buffer with a special Power Control Board inside an N4X class
enclosure.
The Power Control Board (PCB) contains a small CPU that provides monitoring and timing functions,
and can be controlled by the ip.buffer through an I2C/TWI interface.
Part Numbers
Part Number Description
ip.1-32.4g.pc.N4X single-port, 32MByte, 4G Cellular
ip.4-256.4g.pc.N4X four port, 256MByte, 4G Cellular
ip.4-456.4g.pc.2a.N4X four port, 256MByte, 4G Cellular, dual antenna
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
4 | Part Numbers

Features
The PCB includes these features:
•Controlling the power of the ip.buffer
•Waking the ip.buffer up:
◦WAKEUP inputs (pulse or level)
◦Interval or periodic times
◦Magnet/push-button activation
◦Cold power cycle (for engineer site visits)
•Forcing output power on the COM ports
◦Allows the instrumentation to be kept alive while the ip.buffer is sleeping
•Output switches for COM1 to COM4
◦Regulated 12V (See Electrical Characteristics)
◦or VIN
•Power input 11.5V to 30V
◦Approx 150µA quiescent current when ip.buffer off, and power outputs off.
•Future expansion options for ModBus RS485 and SDI-12
ip.buffer Requirements
To gain the full functionality of the PCB, the ip.buffer must be running firmware v3.03.328 or above.
If the ip.buffer is running 3.02 or prior, then some basic, fixed, functionality is provided:
•ip.buffer kept alive for 60 seconds on any WAKEUP
•ip.buffer woken up every 12 hours
•ip.buffer alive for 15 minutes on a cold power cycle (to allow easy setup of a blank ip.buffer)
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
Part Numbers | 5

Version History
Power Control Board
•v1.00.0002, 2023-02-22
◦Initial released version
ip.buffer
•v3.03.328, 2023-02-14
◦Correct I2C internals
◦Prebuilt Lua APIs for accessing PowerControlBoard
◦Prebuilt LuaDebug terminal handler code
Serial Numbers
N4X Version ip.4.N4X ip.1.N4X
PCB (full processor control) ≥ 00-02-ae-20-06-fe ≥ 00-02-ae-10-3a-01
PCB (no processor control) ≥ 00-02-ae-10-3a-d8
≤ 00-02-ae-10-3a-dc
Original (Screw terminal, PTH) ≤ 00-02-ae-20-06-e3 ≤ 00-02-ae-10-3a-e1
Manual for the "Original":
https://scannex.com/files/ipbuffer/ip.buffer_N4X_manual_20210413.pdf
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
6 | Version History

Upgrading
The ip.buffer can be upgraded through the normal methods.
The PCB has to be upgraded on-site, with access to the 10-way IDC connector (HD2), using a standard
CMSIS-DAP Cortex programming adapter.
This requires access to the inside of the N4X enclosure, and cannot be done
remotely.
A Raspberry Pi Pico RP2040 running Free-DAP can be used with the open source EDBG project on a
laptop.
In time, Scannex will be able to provide a small, self-contained, programming adapter to upgrade
the PCB.
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
Upgrading | 7

Connections & Cables
Physical connections and electrial information.
PCB Layout
Pin 1 on each connector highlighted in red/orange.
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
8 | PCB Layout

Configuration
DIP Switch
The DIP1 switch (top left) provides power overrides.
DIP# Description
1 Forces ip.buffer power when "ON" (default "OFF")
2 Forces COM1 POWER OUT when "ON" (default "OFF")
Output Drive Select
HD3 (middle right) controls the power output voltage to the COM1 to COM4 power outputs.
Option Pins Description
VIN 2+3 Direct from POWER input
12V 1+2 From the 12V regulated supply (default)
Magnet Activation
The ip.buffer can be woken with a strong magnet.
The PCB detects with a reed switch that is placed underneath the LED window. A magnet can be
placed above the window, or on the top case side (opposite the connector panel).
The blue LED will flash 2-5 to show the PCB has sensed the magnet.
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
DIP Switch | 9

Connections
COM1-4
•Mating Connector: Souriau UTS6JC10E7P
•Internal Cable
◦Panel Connector: Souriau UTS710E7S
◦8-way JST XHP-8 (CON9, CON11, CON8, CON10)
Souriau JST Pin Description
A 1 POWER OUT#
B 2 GND
C 3 COM#.TX
D 4 COM#.RX
E 5 GND
- 6 COM#.DTR
G 7 WAKEUP#
- 8 (COM1) OUT_CNT digital
- 8 (COM2-4) DSR#
POWER
•Mating Connector: Souriau UTS6JC10E7S
•Internal Cable
◦Panel Connector: Souriau UTS710E7P
◦4-way JST XHP-4 (CON3)
Souriau JST Pin Description
A 1 VIN
B 2 GND
- 3 GND
G 4 WAKEUP PWR
VIN is fused and reverse polarity protected.
Case is tied to GND.
See Input Supply for specifications.
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
10 | COM1-4

Ethernet
•Mating cable:
◦Metz Connect 142M4D15020
◦Farnell 2442817
•Panel Connector: M12 D-Code
M12 D-Code RJ45
1 1
2 2
3 3
4 6
Antenna
•Panel Connector: TNC
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
Ethernet | 11

Internal Connections
ip.buffer COM Ports
D9F ←→ 6-way JST XHP-6 (CON5, CON7, CON4, CON6)
D9F JST Pin Description
4 1 DSR
8 2 RTS
3 3 RXD
7 4 CTS
2 5 TXD
6 6 DTR
BTN
3-way JST XHP-3 (CON13 + CON1)
JST Pin Description
1 LED (blue)
2 GND
3 MAGNET (pull to GND for active)
The Blue LED is controlled by the PCB.
The Amber LED is the ip.buffer’s "M" (MODEM) LED.
The Green LED is the ip.buffer’s "S" (STATUS) LED.
Expansion and Debug
QUICC/I2C
4-way JST XHP-4 (CON12)
JST Pin Description
1 GND
2 3V3
3 SDA
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
12 | ip.buffer COM Ports

JST Pin Description
4 SCL
For adding I2C/TWI devices to the ip.buffer bus.
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
QUICC/I2C | 13

Manufacturing Connections
PROG
10-way IDC (HD2)
Standard CMSIS-DAP / SWD connection for programming the Atmel ATSAML10 CPU.
TEST
8-way SIL 0.1" (CON2)
JST Pin Description
1 GND
2 12V
3 3V3
4 5V
5 GND
6 E.SDA (expansion)
7 E.SCL (expansion)
8 E.INT (expansion)
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
14 | PROG

Electrical Characteristics
Input Supply
•11.5-30V input VIN
•Protection:
◦1.8A slow blow PTC thermal fuse
◦Reverse Battery Protected
◦Power output switches turn off when VIN < 10.5V
Power Outputs
•COM POWER individual ratings:
◦0.7A minimum
◦1.5A typical
◦700mJ max inductive load switch-off energy
◦COM#.CTS is asserted when output voltage > 3V approx.
•12V combined load between all outputs (HD3=12V)
◦1.7A @ VIN=12V
◦2.5A @ VIN=24V
◦3A transient peak for a few seconds
•VIN combined load between all outputs (HD3=VIN)
◦1.7A
◦> 3A for a few seconds
Wakeup Inputs
•3-18V
•Input impedance
◦40k, ≤ 3.3V
◦10k, > 3.3V
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
Input Supply | 15

Lua API
The Lua API for the ip.buffer.
pcb : Power Control Board API
v = pcb.led()
v = pcb.led(seq)
v = lcd.led(seq, enable)
Control LED Sequence Bits
Parameters •seq: The sequence number, e.g. 0x42
•enable: Boolean whether to enable the flag
Returns •v: The bit field of the 25-bits
Description Controls individual LED flash sequences. The PCB will show the highest flash
sequence that’s enabled.
t = pcb.alive()
Read Time Alive
Parameters None
Returns •t.power: Time, in seconds, the N4X has had power
•t.main: Time, in seconds, the ip.buffer has been powered
Description Reads the timer registers.
If the PCB is rebooted, these counters will be reset.
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
16 | pcb : Power Control Board API

pcb.debug()
Enable Debug Timings
Parameters None
Returns None
Description Some timing parameters have enforced minimum values. This API method
allows for shorter times that are more useful for testing.
t = pcb.info()
Query `PCB` Settings
Parameters None
Returns •t.power: The SecondsPowered register
•t.main: The SecondsMain register
•t.counter: The WakeupCounter register
•t.interval: The WakeupInterval register
•t.wake.bits: The WakeupFlags register
•t.wake.text: The text names of why woken
•t.live.bits: The WakeupInputs register
•t.live.text: The text name of the currently active inputs
•t.leds: The LedBits field register
•t.mv: The millivolt reading at VIN
•t.onfor: The PowerTimer down counter register
•t.duration: The <<WakeupTime` register
•t.outs: The PowerControl register
•t.reset.bits: The ControllerStatus register
•t.reset.text: The decoded string values
•t.temp: The temperature in steps of 0.125°C.
Description Reads the I2C memory block and decodes.
Debug function.
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
pcb : Power Control Board API | 17

pcb.led_clear()
Clear LED Patterns
Parameters None
Returns None
Description Clears all LED pattern bits.
pcb.led_set(bits)
Set LED Patterns
Parameters •bits: The LED sequence bits
Returns None
Description Sets the LED sequence bits.
There should be no need to use this function.
This register allows emulation of the rt.buffer LED patterns. However, since the window on the N4X
shows green/amber/blue, it is confusing to flash the PCB’s blue LED while the ip.buffer is alive.
Consequently, by default, the PCB will only flash the blue LED while the ip.buffer is asleep (or when
the magnet/user is triggered).
Triggering the magnet will produce a 2-5 flash pattern on the blue LED.
mv = pcb.mv()
Get Input Voltage
Parameters None
Returns •mv: Millivolt reading from the POWER input
Description Reads the current voltage.
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
18 | pcb : Power Control Board API

pcb.off()
pcb.off(int)
Power Off the ip.buffer
Parameters •int: True means interval. False means periodic (i.e. do not reset the timer)
Returns None
Description Turns off the ip.buffer, and optionally modifies the wakeup counter.
When calling pcb.off() the wakeup counter is not reset. This enables a regular, periodic, wakeup.
When calling pcb.off(true) the wakeup counter is reset to zero, so the ip.buffer will wakeup again
after the wakeup timer - making the delay an interval.
If COM1.DTR is asserted, or if any WAKEUP hardware input is asserted, the
ip.buffer will not turn off (because active hardware controls override the
firmware controls).
this API call will reset the Reasons flags. Use pcb.onfor(0) to release the PCB
control without clearing the wakeup reason flags.
ok = pcb.ok()
Check if PCB present
Parameters None
Returns •ok: True if the PCB is present on the I2C bus
Description Queries the I2C/TWI bus for the PCB address 42.
N4X Reference Manual | © UK 2023 Scannex Electronics Ltd
pcb : Power Control Board API | 19