Difference between revisions of "BoSL Board v0.3"

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<b>BOSL BOARD - THE ULTRA LOW POWERED IOT LOGGING DEVICE</b>
 
<b>BOSL BOARD - THE ULTRA LOW POWERED IOT LOGGING DEVICE</b>
 +
 +
[[File:BoSL.png|thumb|BoSL Board (rev 0.3)]]
  
 
This little beauty costs less than an Arduino and Sim5320a put together, yet it comes already assembled, runs on 4v, is ultra low power consuming (we removed all the overheads of the off the shelf arduinos) and can send data via the CAT-M1 or NB-IoT networks! We estimate that these things can log each minute for over 12months!
 
This little beauty costs less than an Arduino and Sim5320a put together, yet it comes already assembled, runs on 4v, is ultra low power consuming (we removed all the overheads of the off the shelf arduinos) and can send data via the CAT-M1 or NB-IoT networks! We estimate that these things can log each minute for over 12months!
  
 +
==== Specifications ====
 +
 +
Physical Specifications: <br>
 +
Board Width: 88 mm <br>
 +
Board Length: 68.5 mm <br>
 +
Board Height: 18 mm <br>
 +
Weight:
 +
 +
Electrical Specifications: <br>
 +
Min Input Voltage: 3.0 V <br>
 +
Max Input Voltage: 5.5 V <br>
 +
Typical Sleep Current: -- μA <br>
 +
Supply Current Surge Requirement: -- mA <br>
 +
 +
==== Physical Layout ====
 +
[[File:Front Ano.png|thumb|BoSL Board Front]]
 +
 +
[[File:Back Ano.png|thumb|BoSL Board Back, Note Pinout Labeling]]
 +
 +
Reference Table: BoSL Board Front
 +
{| class="wikitable"
 +
|-
 +
| 1 || DC Power Jack
 +
|-
 +
| 2 || I2C IO
 +
|-
 +
| 3 || Power IO
 +
|-
 +
| 4 || Antenna Connector
 +
|-
 +
| 5 || Reset Button
 +
|-
 +
| 6 || SIM Card Holder
 +
|-
 +
| 7 || Digital IO
 +
|-
 +
| 8 || Analog IO
 +
|-
 +
| 9 || Analog IO\TTL Header
 +
|-
 +
| 10 || Integrated Pressure\Temperature Sensor
 +
|-
 +
| 11 || SD Card Holder
 +
|-
 +
| 12 || 8P8P Modular Connector
 +
|-
 +
| 13 || Micro USB Port
 +
|}
 +
 +
==== BoSL BOARD V0.3 PIN LAYOUT ====
 +
{| class="wikitable sortable"
 +
|-
 +
! ATmega328P Pin Number !! Arduino IDE pin !! Internal Use !! Application Notes
 +
|-
 +
| 1 || Reset || RST || Pull Low to reset Arduino
 +
|-
 +
| 2 || D0 || USB RX || Free for use when no micro-USB connected
 +
|-
 +
| 3 || D1 || USB TX || Free for use when no micro-USB connected
 +
|-
 +
| 4 || D2 || SIM7000 RX || Not Available for use
 +
|-
 +
| 5 || D3 || SIM7000 TX || Not Available for use
 +
|-
 +
| 6 || D4 || SIM7000 On/Off || Not Available for use
 +
|-
 +
| 7 || VCC || VCC || N/A
 +
|-
 +
| 8 || GND || GND || N/A
 +
|-
 +
| 9 || Crystal || XTAL || Not Available for use
 +
|-
 +
| 10 || Crystal || XTAL || Not Available for use
 +
|-
 +
| 11 || D5 || SIM7000 DTR || Not Available for use
 +
|-
 +
| 12 || D6 || None || Free for use
 +
|-
 +
| 13 || D7 || None || Free for use
 +
|-
 +
| 14 || D8 || None || Free for use
 +
|-
 +
| 15 || D9 || None || Free for use
 +
|-
 +
| 16 || D10 || SD Chip Select || Free for use with no SD card inserted
 +
|-
 +
| 17 || D11 || SD MOSI || Free for use with no SD card inserted
 +
|-
 +
| 18 || D12 || SD MISO || Free for use with no SD card inserted
 +
|-
 +
| 19 || D13 || SD Serial Clock || Free for use with no SD card inserted
 +
|-
 +
| 20 || VCC || VCC || N/A
 +
|-
 +
| 21 || Aref || None || Free for use
 +
|-
 +
| 22 || GND || GND || N/A
 +
|-
 +
| 23 || A0 || None || Free for use
 +
|-
 +
| 24 || A1 || None || Free for use
 +
|-
 +
| 25 || A2 || None || Free for use
 +
|-
 +
| 26 || A3 || None || Free for use
 +
|-
 +
| 27 || A4 || SDA || Free for use when not operating I2C bus
 +
|-
 +
| 28 || A5 || SCL || Free for use when not operating I2C bus
 +
|-
 +
|}
 +
 +
==== Low Power Sleep Guide ====
 +
 +
==== New Battery Test ====
 +
 +
New batteries were set up on 5 on five BoSL boards as an endurance test to see how long each would last. The graphs of various results are displayed below. The linearity in the loggins time graph suggests that the Arduino is logging at regular and consistent intervals (in this test about 577 times per day). The battery's voltage is linear down to about 3300 mV, and then declines sharply before cutting out. The majority of the battery's capacity is thus above the 3300 mV threshold required for in-spec operation of the BoSL board. Extrapolating out the data to a once per hour transmit rate, it is estimated that the BoSL board will have a battery life of just under one year.
 +
 +
<gallery>
 +
New Batteries.jpg|Batteries Used for BoSL Endurance Test
 +
Volt Time.png|Graph of Battery Voltage vs Time
 +
Log Time.png|Graph of Number of Loggins vs Time
 +
</gallery>
 +
 +
==== ALDI Mobile SIM Test ====
 +
 +
ALDI mobile does not have access to the CAT-5m network and so it need to be tested whether the BoSL board can upload using ALDI-mobile SIM card on the 4g network, as being able to do so would be of great cost savings.
 +
From testing the ALDI sim's worked when the APN was changed to mdata.net.au and the regular transmit procedure for was followed.
  
 
==== SIM7000 SIM CARD COMMUNITCATION ISSUE ====
 
==== SIM7000 SIM CARD COMMUNITCATION ISSUE ====
Line 51: Line 181:
 
We did some probing around with an oscilloscope to see if there were any electrical differences between the good and bad boards. Both had identical measured crystal frequencies of 7.9 - 8.1 MHz and SIM7000 - ATmega382p baud rates of about 9540.
 
We did some probing around with an oscilloscope to see if there were any electrical differences between the good and bad boards. Both had identical measured crystal frequencies of 7.9 - 8.1 MHz and SIM7000 - ATmega382p baud rates of about 9540.
  
−
The one difference which was found was in the signals issued from the SIM 7000 to the SIM card on pins SIM_VDD, SIM_RST, SIM_CLK, and SIM_DATA.
+
The one difference which was found was in the signals issued from the SIM 7000 to the SIM card on pins SIM_VDD, SIM_RST, SIM_CLK, and SIM_DATA. They are quite different. Notably the bad boards only power the SIM VDD line for 3 pulses of 24 ms long whereas the working boards good boards keep this line high. The measurements are taken after the AT+CFUN=1 command is issued in the above test sequence.
 +
 
 +
In doing some reading on the issue it seems to have been encountered before, with the conclusion that it likely a soldering issue, possible inside the SIM7000 modual, thus leaving little course for it to be able to repaired.  
  
 
===== for boards with a SIM inserted =====
 
===== for boards with a SIM inserted =====
Line 60: Line 192:
 
| SIM_VDD||  
 
| SIM_VDD||  
 
[[File:GOOD VDD SIM.jpg|thumb|GOOD VDD SIM]]
 
[[File:GOOD VDD SIM.jpg|thumb|GOOD VDD SIM]]
−
|| Example
+
||  
 +
[[File:BAD VDD SIM.jpg|thumb|BAD VDD SIM]]
 
|-
 
|-
 
| SIM_RST ||  
 
| SIM_RST ||  
 
[[File:GOOD RST SIM.jpg|thumb|GOOD RST SIM]]
 
[[File:GOOD RST SIM.jpg|thumb|GOOD RST SIM]]
−
|| Example
+
||  
 +
[[File:BAD RST SIM.jpg|thumb|BAD RST SIM]]
 
|-
 
|-
 
| SIM_CLK ||  
 
| SIM_CLK ||  
 
[[File:GOOD CLK SIM.jpg|thumb|GOOD CLK SIM]]
 
[[File:GOOD CLK SIM.jpg|thumb|GOOD CLK SIM]]
−
|| Example
+
||  
 +
[[File:BAD CLK SIM.jpg|thumb|BAD CLK SIM]]
 
|-
 
|-
 
| SIM_DATA||  
 
| SIM_DATA||  
 
[[File:GOOD DATA SIM.jpg|thumb|GOOD DATA SIM]]
 
[[File:GOOD DATA SIM.jpg|thumb|GOOD DATA SIM]]
−
|| Example
+
|| No Reading
 +
|}
 +
 
 +
===== for boards without a SIM inserted =====
 +
{| class="wikitable"
 +
|-
 +
! PIN !! Good Board !! Bad Board
 +
|-
 +
| SIM_VDD||
 +
[[File:GOOD VDD NSIM.jpg|thumb|GOOD VDD NSIM]]
 +
||
 +
[[File:BAD VDD NSIM.jpg|thumb|BAD VDD NSIM]]
 +
|-
 +
| SIM_RST ||
 +
[[File:GOOD RST NSIM.jpg|thumb|GOOD RST NSIM]]
 +
||
 +
[[File:BAD RST NSIM.jpg|thumb|BAD RST NSIM]]
 +
|-
 +
| SIM_CLK ||
 +
[[File:GOOD CLK NSIM.jpg|thumb|GOOD CLK NSIM]]
 +
||
 +
[[File:BAD CLK NSIM.jpg|thumb|BAD CLK NSIM]]
 +
|-
 +
| SIM_DATA||
 +
[[File:GOOD DATA NSIM.jpg|thumb|GOOD DATA NSIM]]
 +
|| No Reading
 
|}
 
|}
 +
===Battery Usage===
 +
some can be copied from above.
 +
====Chinese 3.7 volt 12Ah====
 +
[[File:Blue china.jpg|thumb|Challenge Test]]
 +
 +
The 3.7V lithium-ion battery was tested to understand how many times of data transmission it can undertake before the battery is dead.
 +
 +
The BoSL board, in this challenge test, was programmed to upload measured pressure, temperature and battery level every minute. The test was started on 19th Dec 2019 with a fully charged battery (4.18V). BoSL board stopped logging on 3rd Jan 2020 with a battery voltage level of 2.83V. During this 15-day test, data was transmitted for 8,546 times.
 +
 +
====D-size 3.6 volt 19Ah====
 +
A D-size non-rechargeable lithium battery (3.6V, 19Ah) was purchased from an online supplier Element 14. Due to the higher capacity of this D-size battery, BoSL development team originally hope this battery can bring longer lifetime to our BoSL boards. The battery was tested in the field up in the Dandenong Mountain. The BoSL board logger, in this project, was programmed to have a variable logging interval (max. 1 min, but min. a hour).
 +
 +
[[File:D size.jpg|thumb]]
 +
 +
 +
The test started on 9th Apr 2020 and the BoSL board stopped uploading on 2nd Jun 2020. In this 55-day test, data were transmitted 2,184 times to our online data server. Due to the current COVID-19 restriction, we have not brought the sensor module back to check the remaining battery level. But based on the current result, it is clear that the Chinese blue battery performs better than the D-size battery.
 +
 +
== MQTT ==
 +
 +
For details on how to use MQTT with the board check out [[MQTT]]

Latest revision as of 01:29, 13 April 2023

BOSL BOARD - THE ULTRA LOW POWERED IOT LOGGING DEVICE

BoSL Board (rev 0.3)

This little beauty costs less than an Arduino and Sim5320a put together, yet it comes already assembled, runs on 4v, is ultra low power consuming (we removed all the overheads of the off the shelf arduinos) and can send data via the CAT-M1 or NB-IoT networks! We estimate that these things can log each minute for over 12months!

Specifications

Physical Specifications:
Board Width: 88 mm
Board Length: 68.5 mm
Board Height: 18 mm
Weight:

Electrical Specifications:
Min Input Voltage: 3.0 V
Max Input Voltage: 5.5 V
Typical Sleep Current: -- μA
Supply Current Surge Requirement: -- mA

Physical Layout

BoSL Board Front
BoSL Board Back, Note Pinout Labeling

Reference Table: BoSL Board Front

1 DC Power Jack
2 I2C IO
3 Power IO
4 Antenna Connector
5 Reset Button
6 SIM Card Holder
7 Digital IO
8 Analog IO
9 Analog IO\TTL Header
10 Integrated Pressure\Temperature Sensor
11 SD Card Holder
12 8P8P Modular Connector
13 Micro USB Port

BoSL BOARD V0.3 PIN LAYOUT

ATmega328P Pin Number Arduino IDE pin Internal Use Application Notes
1 Reset RST Pull Low to reset Arduino
2 D0 USB RX Free for use when no micro-USB connected
3 D1 USB TX Free for use when no micro-USB connected
4 D2 SIM7000 RX Not Available for use
5 D3 SIM7000 TX Not Available for use
6 D4 SIM7000 On/Off Not Available for use
7 VCC VCC N/A
8 GND GND N/A
9 Crystal XTAL Not Available for use
10 Crystal XTAL Not Available for use
11 D5 SIM7000 DTR Not Available for use
12 D6 None Free for use
13 D7 None Free for use
14 D8 None Free for use
15 D9 None Free for use
16 D10 SD Chip Select Free for use with no SD card inserted
17 D11 SD MOSI Free for use with no SD card inserted
18 D12 SD MISO Free for use with no SD card inserted
19 D13 SD Serial Clock Free for use with no SD card inserted
20 VCC VCC N/A
21 Aref None Free for use
22 GND GND N/A
23 A0 None Free for use
24 A1 None Free for use
25 A2 None Free for use
26 A3 None Free for use
27 A4 SDA Free for use when not operating I2C bus
28 A5 SCL Free for use when not operating I2C bus

Low Power Sleep Guide

New Battery Test

New batteries were set up on 5 on five BoSL boards as an endurance test to see how long each would last. The graphs of various results are displayed below. The linearity in the loggins time graph suggests that the Arduino is logging at regular and consistent intervals (in this test about 577 times per day). The battery's voltage is linear down to about 3300 mV, and then declines sharply before cutting out. The majority of the battery's capacity is thus above the 3300 mV threshold required for in-spec operation of the BoSL board. Extrapolating out the data to a once per hour transmit rate, it is estimated that the BoSL board will have a battery life of just under one year.

  • Batteries Used for BoSL Endurance Test

  • Graph of Battery Voltage vs Time

  • Graph of Number of Loggins vs Time

ALDI Mobile SIM Test

ALDI mobile does not have access to the CAT-5m network and so it need to be tested whether the BoSL board can upload using ALDI-mobile SIM card on the 4g network, as being able to do so would be of great cost savings. From testing the ALDI sim's worked when the APN was changed to mdata.net.au and the regular transmit procedure for was followed.

SIM7000 SIM CARD COMMUNITCATION ISSUE

2019/11/21:

There has been an issue where some of our boards aren't recognising the SIM cards, and so can't upload any data. To detect is if the issue is present the following AT command sequence can be sent.

GOOD RESPONSE
Command Response
AT+CFUN=0
+CPIN: NOT READY
OK
AT+CFUN=1
OK
+CPIN = READY
SIM READY
BAD RESPONSE
Command Response
AT+CFUN=0
+CPIN: NOT READY
OK
AT+CFUN=1
OK
+CPIN: NOT INSERTED

We did some probing around with an oscilloscope to see if there were any electrical differences between the good and bad boards. Both had identical measured crystal frequencies of 7.9 - 8.1 MHz and SIM7000 - ATmega382p baud rates of about 9540.

The one difference which was found was in the signals issued from the SIM 7000 to the SIM card on pins SIM_VDD, SIM_RST, SIM_CLK, and SIM_DATA. They are quite different. Notably the bad boards only power the SIM VDD line for 3 pulses of 24 ms long whereas the working boards good boards keep this line high. The measurements are taken after the AT+CFUN=1 command is issued in the above test sequence.

In doing some reading on the issue it seems to have been encountered before, with the conclusion that it likely a soldering issue, possible inside the SIM7000 modual, thus leaving little course for it to be able to repaired.

for boards with a SIM inserted
PIN Good Board Bad Board
SIM_VDD
GOOD VDD SIM
BAD VDD SIM
SIM_RST
GOOD RST SIM
BAD RST SIM
SIM_CLK
GOOD CLK SIM
BAD CLK SIM
SIM_DATA
GOOD DATA SIM
 No Reading
for boards without a SIM inserted
PIN Good Board Bad Board
SIM_VDD
GOOD VDD NSIM
BAD VDD NSIM
SIM_RST
GOOD RST NSIM
BAD RST NSIM
SIM_CLK
GOOD CLK NSIM
BAD CLK NSIM
SIM_DATA
GOOD DATA NSIM
 No Reading

Battery Usage

some can be copied from above.

Chinese 3.7 volt 12Ah

Challenge Test

The 3.7V lithium-ion battery was tested to understand how many times of data transmission it can undertake before the battery is dead.

The BoSL board, in this challenge test, was programmed to upload measured pressure, temperature and battery level every minute. The test was started on 19th Dec 2019 with a fully charged battery (4.18V). BoSL board stopped logging on 3rd Jan 2020 with a battery voltage level of 2.83V. During this 15-day test, data was transmitted for 8,546 times.

D-size 3.6 volt 19Ah

A D-size non-rechargeable lithium battery (3.6V, 19Ah) was purchased from an online supplier Element 14. Due to the higher capacity of this D-size battery, BoSL development team originally hope this battery can bring longer lifetime to our BoSL boards. The battery was tested in the field up in the Dandenong Mountain. The BoSL board logger, in this project, was programmed to have a variable logging interval (max. 1 min, but min. a hour).

D size.jpg


The test started on 9th Apr 2020 and the BoSL board stopped uploading on 2nd Jun 2020. In this 55-day test, data were transmitted 2,184 times to our online data server. Due to the current COVID-19 restriction, we have not brought the sensor module back to check the remaining battery level. But based on the current result, it is clear that the Chinese blue battery performs better than the D-size battery.

MQTT

For details on how to use MQTT with the board check out MQTT

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