so i am having an issue trying to readdress a blinkM, i've also tried on a MaxM, but i would guess the firmware is the similar to a point.
so, i started with my own bit of code to sort out what i knew and didnt know about i2c, a fair bit - but i can write to the blink's with no problem. i have 3 pots hooked up and can control rgb directly. nothing new, i know, but it was an exercise.
so the next step is to control multiple blinks, independently. i can't get the addresses to stick though. here is my edited version of the stock code that is in the examples. i could be doing something silly, like sending hex instead of int, or something very strange could be going on... any help would be appreciated.
#include "Wire.h" #include "BlinkM_funcs.h" byte blinkm_addr = 0x08; byte blinkm_globaladdr = 0x00; int temp; void setup() { Serial.begin(19200); Serial.println("BlinkMFactoryReset"); BlinkM_beginWithPower(); delay(100); Serial.print("Setting I2C address..."); BlinkM_setAddress( blinkm_addr ); Serial.println(blinkm_addr, HEX); delay(500); Serial.print("Verifying I2C address, sent to 'correct' address..."); temp = BlinkM_checkAddress( blinkm_addr ); //sent to what it should be Serial.println(temp,DEC); delay(500); Serial.print("Verifying I2C address, sent to global address..."); temp = BlinkM_checkAddress( blinkm_globaladdr ); //sent to global, should return matching Serial.println(temp,DEC); Serial.println("Did it work?"); } void loop() { digitalWrite(13, HIGH); // flash Arduino LED for fun delay(300); digitalWrite(13, LOW); delay(300); }
...as continuation, i looked inside the blinkM_funcs.h and uncommented some of the debug messages, no change, still having an address problem.
here is the response, sorry it a bit of a mess
BlinkMFactoryReset Setting I2C address...8 Verifying I2C address, sent to 'correct' address...received addr: 0x80 VerifyiBlinkMFactoryReset Setting I2C address...8 Verifying I2C address, sent to 'correct' address...received addr: 0x80 Verifying I2C address, sent to global address...No response, that's not good -1 Did it work?
Have you tried using the "BlinkMTester" Arduino sketch that comes as part of the BlinkM Examples bundle? It has the ability to let you re-address BlinkMs and I use it all the time.
Let me know if BlinkMTester works. If it doesn't, but otherwise the BlinkM appears to function, then you may have a bad BlinkM. We can arrange an exchange for you then.
HI Todd, thanks for the reply. The example does work, but i am getting strange results when i request the address. here is the output below.
Looking for a BlinkM: Device found at addr 2 cmd>A Resetting address to default 9: cmd>A1 Setting address to: 1 cmd>a Address: -1 cmd>
what do you think? is this normal, or something a bit strange? i can complete my project, but i think it's odd that the firmware updater doesn't work, nor when requesting an address, to get something meaningful back.
it works, but i am really confused at "how" to send the addresses.
if the default address is 0x09, i would expect to change the address in a similar format - like 0x11, or 0x34. but if i write the destination address in that format - no luck, it doesn't work - if i write as plain 11 or 34, it works, so what is the " " or ' ' or 0x for??
