Difference between revisions of "BoSL Board v0.5"

Revision as of 12:58, 28 September 2023

The BoSL board rev 0.5.0 arrived and its time to test how it works. Lets jump into it!

Straight out of the packet:

Plugging in a battery the idle current 840 µA.
Touching a screw driver to the F1 TEST pad lights up the test LED.
When the WDT_EN jumper is closed the current jumps up to ~10 mA. This seems appropriate, if it enables the voltage on VPP.

From now on WDT_EN will be closed

Voltage is good on 3V3 and VBAT. Measured (3.370V and 3.941V respectively).
The bootloader could be programmed using the normal process of Arduino as ISP. Specifically I used the [[1]] board library and selected the ATmega640 board. I then used BOD: 2.7V, bootloader: yes UART0, clock: external 8MHz, EEPROM: EEPROM retain, compiler LTO: LTO disabled, pinout: AVR pinout.
Idle current now 18 mA.
I then plugged in the board via USB and it was recognised as a serial port.
Programs could be uploaded via USB now, the serial monitor analogue read, and the RX,TX, LED, and USB, LEDs work.

I could get a response form the SIM7000 when I made the following changes to the BoSLpass script.
- Replaced simCom soft serial object with Serial1
- set PWRKEY 38, DTR 44, and defined SIM_BUF_EN 25
Pulled SIM_BUF_EN HIGH to turn on the voltage level converter.

Errors:

WDT_EN is not the correct name for the jumper as the WDT is disabled when closed. It should be not WDT_EN

@@ Line 15: / Line 15: @@
 * Programs could be uploaded via USB now, the serial monitor analogue read, and the RX,TX, LED, and USB, LEDs work.
+*I could get a response form the SIM7000 when I made the following changes to the BoSLpass script.
+**Replaced simCom soft serial object with Serial1
+**set PWRKEY 38, DTR 44, and defined SIM_BUF_EN 25
+* Pulled SIM_BUF_EN HIGH to turn on the voltage level converter.
 Errors:
 # WDT_EN is not the correct name for the jumper as the WDT is disabled when closed. It should be not WDT_EN