MicroPython Forum (Archive)

Looks like the pullup resistors are missing.

According to the specs, wait_tx_done() waits for the UARFT FIFO to be empty. But when you write in Python, the data goes to the tx_buffer first, and then into the UART fifo. So it may be, that you call wait_tx_done() before the UART FIFO has been filled. Could you try to insert a short sleep() betwe...

Did you try to increase the timeout to the worst value expected depending on message length & baud rate? That is the second parameter of wait_tx_done.

Gerne

The answer is: No. The Attiny85, as much as I like it, has way to little memory, both flash & RAM. If you look for low cost chips, go for the WinnerMicro W600 (Chip costs << 1 USD, modules at about 2 USD) or ESP8266 or .....

The ADC output is an integer. Can you stay with integers in the range +/.- 2**30 and integer arithmentic? Small integers in that range do not require to allocate memory.

With Viper code you should be able to access the register directly, if it is memory mapped. But, sorry for that, I have a different concern: Since on the ESP8266 with MicroPython the variation of ISR latency time is several 100 µs, looking for 12.5ns resolution is not needed. You can go as well for ...

suggest that I break the file into many partial ones or use methods like seek, in order to position the point of reading/writing (does that mean that by positioning those points I manage not to load the whole file in RAM?) Yes, you can do so. Please note, that on XBEE write always writes to the end...

A few observations: a) it's quite challenging to go for a 3 kHz acquisition rate. That leaves only about 3 ms per value, which is not a lot. b) the IRQ response time of the ESP32 varies a lot. You cannot expect the data to be acquired equidistant timed. The irq response time I have seen went up to 1...

You are getting this error because WROOM device has no SPIRAM. The SPIRAM is an additional RAM chip, connected by an high speed SPI interface. This the name. And therefore you see no difference between the two versions. With the WROOM device better use the GENERIC firmware.