Search results

Attached is the first part of some code. I have a sensor which transmits a fault signal in the event of a problem. If there is a fault the sensor transmits the fault signal every 10seconds. When the system is first switched on a red LED flashes and then remains on to indicate a valve is closed...

I get data from a sensor via a serial link. No problems, this part works fine. If I include the four lines near the bottom to convert the three bytes into a word I get a large number (about 50,000) instead of the expected 200 to 999. Inspecting the three bytes at the first debug the numbers are...

I am doing something wrong with the serout command. I want to use a device (Atlas Scientific EZO ORP) that communicates with 5v RS232 protocol. Its default baud rate is 9600. The device allows the user to change this rate to a number of other rates but first the change command has to be sent at...

Has anyone any experience with picaxe and low cost BLE modules?

If the 'setfreq' command is at the beginning of the program an error massage ' Start0 must be at the start of the program'. If the 'setfreq' command is inserted inside the 'Start0' routine another error message appears 'setfreq not allowed in multitask program'. I also cannot use the very useful...

I am doing a PICAXE installation on a friend’s computer. The AXE027 has been installed correctly. I can go to device manager, click on USB controllers and see the ‘AXE027 PICAXE USB’ appear and disappear as I plug the cable in and out. Right click on it and select properties and read ‘This...

I understand that picaxes can only handle positive integers from 0 to 65,535. Does anyone know of a mathematical sleight of hand that will allow me to find the reciprocal of a word and then multiply it to bring it back to a word once more? For example; 1 / 20,000 = 0.00005 0.00005 x 1000 x 1000...

I need to read the temperature and I do not like to re-invent the wheel so, not the cheapest way, I ordered a DS18B20 from Mouser. The 08M2 circuit is simple, + to +5v, DQ to leg5 (C.2) with a 4k7 pullup to +5v, GND to 0v. The code is: main: readtemp12 c.2,w1 debug goto main The data pin...

I have a reliable wireless link using a low cost transmitter and receiver pair running at 1200baud using serin and serout. I recently bought some 18M2 devices and experimented with the RFout and RFin commands. With the two chips connected on the bench with a wire, no problems. When I use the...

I have a system with a number of pumps, water tanks and float switches controlled by a 18M2. The software works correctly. I continuously scan the float switches and switch the pumps on and off as required. No problems. I want to count the number of times a particular pump is switched on and...

I want to send via the serial output a string of numbers. I am constrained by the hardware to only be able to use out0. I am using the sertxd command. The device is an 08M2. symbol tripped = pin3 main: pause 100 if tripped = 0 then goto main pause 100 if tripped = 0 then goto main let...

I have a NO relay contact with a pull up resistor. I need to count how many times it closes within a certain period. Using the count command I get the wrong answer because of switch bounce. To get rid of switch bounce in software normally requires a short pause. What do I use for the count...

For some time now I have been having problems with the 08M2 PICAXE chip randomly resetting to the beginning of the code. I believed it was a layout problem and made a work around in software. I have since made two more projects but I am still getting unexplained resets. The latest project is a...

I am looking for ideas on a timer or counter that will run while using ‘serin’. I am running some code and hardware with a 08M2 that is working perfectly. Part of it uses a wireless link and most of the time the program sits waiting for a signal using the ‘serin’ command. When a signal is...

How many ways are there to reset a picaxe? I have a picaxe system that works, as designed, perfectly but keeps resetting itself randomly. It does this at a rate of once every 48 hours to about once every 2 hours. I have previously built over 100 of these systems without this problem. The last...

I am trying to change an IO port from an input to an output and back again while running some code. I am obviously stupid because no matter what I try, I fail. How is it done?

A 16bit random number is generated and stored in EEPROM. This number can be transmitted via a short range RF link to a receiver and a picaxe. The receiver picaxe has a switch which when operated will cause the microcontroller to go into a “learn” mode. The random number (transmitter ID code) is...

I am manufacturing a device that currently uses an 08M in a small niche market. Can anyone recommend a product that can convert PIC basic to a form suitable to compile and then programme a raw Microchip device? I have looked at Microchips PRO basic and compared to Rev Eds version will require a...

I am using pulsin to watch for a pulse of a specific width to appear on an input. The software then goes and does its thing. This pulse will come from a dumb RF receiver so a lot of noise is present so the current software is continuously waiting for this specific pulse width and rejecting other...

I have read and re-read the read and write pages in manual 2 but cannot understand how to write and read a wordvariable into EEPROM. There is no wiord example! The example shown has no bearing on word variables and I don't have a serial LCD. Would someone please give me an example of the two...