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About kevyk
since
11-28-2019
03-02-2020
kevyk
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16
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12-17-2019
10:19 PM
Thanks Handytech. The save rate is only for the next power on, right? The data is not saved and loaded otherwise, correct? What are the advantages and disadvantages of having a more frequent save_data rate? Why wouldn't you choose say every 5 minutes or ever hour or something? Thanks!
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12-16-2019
11:07 PM
Hi. In the sample given in implementing the BSEC, when they call bme680_bsec_loop, they use a save_data-to-flash rate of 10,000 (every 500 minutes). Isn't that too infrequent? Shouldn't it be saved with more frequency, say perhaps every hour or even every 5 minutes or so? Thanks, Kevin
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12-14-2019
06:19 PM
Ah, OK. Things are slowly coming into focus for me. Thanks! After the run-in period, when I breath on the sensor the IAQ will jump to 500. You mentioned that the IAQ reading can still change even during the run-in period however when I breath on it during the run in period I don't see any change in the IAQ (stays at 25) until after the 5 minutes - then it tracks my breath accordingly. I tried hand sanitizer too and same result during the run-in period - no change at all. However the raw_gas value does change dramatically when breathing on it even during the run-in. So could it be that there is indeed no movement in the IAQ during run-in? Does it need to be enabled during run-in? Or maybe I'm missing something. Thanks again!
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12-14-2019
06:42 AM
Hi, I'd like confirmation of a probable bug in the BSEC_integration.c file, in the bsec_iot_init function. It reads: return_values_init bsec_iot_init(uint8_t deviceAddr, float sample_rate, float temperature_offset, bme680_com_fptr_t bus_write, bme680_com_fptr_t bus_read, sleep_fct sleep, state_load_fct state_load, config_load_fct config_load)
{
return_values_init ret = {BME680_OK, BSEC_OK};
bsec_library_return_t bsec_status = BSEC_OK;
uint8_t bsec_state[BSEC_MAX_PROPERTY_BLOB_SIZE] = {0}; // <--- BUG
uint8_t bsec_config[BSEC_MAX_PROPERTY_BLOB_SIZE] = {0};
uint8_t work_buffer[BSEC_MAX_PROPERTY_BLOB_SIZE] = {0}; // <--- BUG
int bsec_state_len, bsec_config_len; and I'm pretty sure it should read: return_values_init bsec_iot_init(uint8_t deviceAddr, float sample_rate, float temperature_offset, bme680_com_fptr_t bus_write, bme680_com_fptr_t bus_read, sleep_fct sleep, state_load_fct state_load, config_load_fct config_load)
{
return_values_init ret = {BME680_OK, BSEC_OK};
bsec_library_return_t bsec_status = BSEC_OK;
uint8_t bsec_state[BSEC_MAX_STATE_BLOB_SIZE] = {0}; // <--- BUG fixed
uint8_t bsec_config[BSEC_MAX_PROPERTY_BLOB_SIZE] = {0};
uint8_t work_buffer[BSEC_MAX_WORKBUFFER_SIZE] = {0}; // <--- BUG fixed
int bsec_state_len, bsec_config_len; Please let me know if this is indeed a bug. My app was crashing before the bug fix and is working now after the above fix. It was crashing because bsec_iot_init was calling state_load with the wrong buffer size and the subsequent call to bsec_set_state was failing. If this is confirmed to be a bug, how is it possible that no one else has discovered and reported this problem in the past two years? Thank you, Kevin
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12-13-2019
06:28 PM
Thanks o_o. With such an important piece of information as a 5 to 25 minute delay in the IAQ, I wonder why this isn't documented in the BSEC Integration Guide nor anywhere else I've read. Hmmm.... A more important question is: The data changes you are speaking about is not the IAQ data, right? Because that doesn't change for 5 (or 25) minutes. Are you speaking about the raw values that DO seem to change right after startup? The direct hardware sensor registers, not software data coming out of the BSEC? I assume there is no way to have the BSEC start outputting the IAQ right away after a power up, right? Thanks for the info!
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