Technical FAQs – GainSpan FAQ HelpDesk

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RF Testing
- GS2000 RF Testing Basics
GS2000 Live Smart Calibration FAQs
- Does Live Cal run when the device is not associated with an AP or when Limited AP is not started?
- Does Over the Air Firmware Update (OTAFU) erase Live Cal information? Does the device need to be in RF isolation when it is doing Live Calibration?
- Does the device need to be in RF isolation when it is doing live calibration?
- Calibration timing; when after power up does it start and how long does it last?
- When should one run first time Live Cal? For example, during final assembly or after final assembly? Do you have an AT command to force a calibration?
- What are the benefits of Live Cal? Why should customers enable and run Live Cal?
Hardware FAQs
- What is the cold boot timing in GS2011?
- How much Erase/write cycles does GS module support in GS2K?
- Is there a possibility that if the battery is plugged out and plugged back in fast that the reset doesn't happen?
- Is there a possibility of CORE BROWNOUT happening with quick battery plug yes and plug in?
- Why are "soft start" voltage regulators or Load switches recommended?
- What is the reset state of the GS2000 digital pins?
- Do I need a code restore switch?
- Can GS2100M use standby mode?
- Can the host CPU control power to the Gainspan module?
- Can unused module pins be left unconnected?
- Can I use the Program Pin (gpio27 or gpio31) and other boot control pins (gpio25 and gpio21) for other functions?
- Can I use the sigma-delta ADC's as single ended ADC's by grounding the negative input?
- What is the full scale input voltage of the ADC's?
- Can I use a battery or super cap to retain RTC content through a power failure?
FCC/CE FAQs
- ★ Antennas GainSpan used for FCC qualification.
- Do you know what portions of FCC/CE testing would need to be redone if we do not use one the antennas tested by Gainspan for cert?
MAC Address FAQs
- The GS2000 Modules uses two (2) MAC Addresses that are written on Module OTP memory. How are theese two (2) MAC Addresses Used in the GS2000 Modules?
- When issuing the command to get the MAC address, we would sometimes get the number printed on the module's sticker, and sometimes we would get a value that was one higher.
Power FAQs
- Understanding about STANDBY, DEEPSLEEP and SLEEP and respective current consumptions
- What is the comparison of GS2100M and GS2011M modules?
- What is the minimum low time for GPIO37 to go HIGH after MCU sends WRITE/READ request?
- What is the maximum frequency supported by GS SPI SLAVE?
- When is sensitivity of the module measured?
- What are the standard current consumption numbers?
- What are the standard recommendations for saving power?
- How long does it take to power up, connect to an AP and send a few bytes of data to a cloud server?
- What is the minimum power consumption for the GS2011 modules while maintaining the WiFi network connection?
- What are the various power saving states supported by the GS2000?
- If the voltgate monitoring circuitry is outside the SoC, what is the thread-hold, and what does it do upon detection?
GS2000 SoC FAQs
- How could external chips (e.g., MCU) reset GS2000?
Provisioning FAQs
- Provisioning Made Easy
- WPS Provisioning
- What are the various provisioning methods supported?
GS2000 Flashing FAQs
- How do I enable flashing of GS2000 modules with baud rate 921K?
- Why are there two (2) Flashes on the GS2000 (What is the purpose of each)?
Firmware FAQs
- ★ 5.1.7 & 5.2.1 - Which firmware to use and what are the major differences
- Do we support the WPA AOSS MODE in the latest GS2K releases?
- What is the use case of OTAFU Firmware upgrade with the HTTPS?
Webpages FAQs
- What is the CGI agrument format?
- How do I build a Custom Webpages and load it into the GainSpan Module?
- Is there a way for the embedded web server to work with dynamic web pages?
- What is the maximum size limit of the custom webpages uploaded in the GS2011M and GS2100M modules?
Software Tools FAQs
- Can we use standard SPI Tools such as Aardvark or Cheetah to act as master with the GS2000 SPI DMA in Slave mode?
Network FAQs
- What is 802.11b protection mode, CTS to self and when is it used?
Certificates FAQs
- How to download and convert a CA certificate?
- What are the formats we are supporting for the certificates?
Using GainSpan gs2k_flashprogram GUI Application FAQs
- How do I enable flashing of GS2000 based modules with baud rate 921K?
Wi-Fi 3G, 4GLTE, iOS, Android FAQs
- How to use Wi-Fi and 3G coexistence on smartphone, when it is connected to GS module limited AP mode on Wi-Fi?
Wi-Fi Security FAQs
- Security Blog
- How does the GS2000 handle security schemes?
- Does the GS2000 support Adhoc mode (what is the alternative)?
- What types of WiFi Security are supported in GS2000 module software?
Building Custom Binaries - Using the SDK Builder FAQs
- How do I Program the GainSpan Modules?
- How do you build custom binaries on a GainSpan module?
Debugging FAQs
- When using IAR to debug, how do I stop the warning dialogs about the main entry point from appearing?
APIs FAQs
- Can the limited AP SSID be dynamically hidden/unhidden via GEPS APIs?
Webserver FAQs
- Can the value of the Content-Type header be changed?
Clock and Memory FAQs
- What are the various clock sources available for GS2000?
- What is the Memory availability on the GS2000?
- How much of RTC memory is being used in TLS and S2W Application?
- How does the speed of memory accesses compare for SRAM, RTC SRAM and RTC Latch Memory?
- How to enable the PLL Clock?
Reference Platforms FAQs
- How to enable SysQual in ADKs which is currently not enabled in all TLS based ADKs?
- Can you tell us what the maximum returned list size may be from an AT+SW scan? Or stated another way if there were hundreds of available AP's how big might the return list be before the GS2011MIES no longer gives an entry?
- Which resets should be resetting the GPIO block?
- If we want to use GS2100MIP module as wearable device and we want to comply with SAR exclusion I understood that our software should limit TX power below 9.8dBm. How we do that in practice?
- Is there a way to set the hostname used by a GainSpan module (for both GS1011 and GS2000 cases)? Either through provisioning or through an AT command for both of the following cases:
- What is the Serial Interface Boot Up in the case of Dual Interface?
- How to calculate SPI master clock?
- How many buffers are allocated for TCP Tx and Rx?
- How much of RTC memory is being used in TLS and S2W Application?
- What are the file system present in GS2000?
- Can we use standard SPI Tools such as Aardvark or Cheetah to act as master with the GS2000 SPI DMA in Slave mode?
- What is Nagle Algorithm?
- Is there a way to Enable/Disable Nagle Algorithm in GS2000?
- Is loading of the certificates a must for HTTPS communication?
- There seems to be some limitation when sending data over SSL. The maximum length of the packet size should be 1024 bytes. Is this right?
- What flags do I need to enable for the SPI DMA to work when we have the SDK?
RTOS FAQs
- If my design wants to use the network stack with the embedded RTOS, can I still use the Gainspan module as a WiFi device?
Software, Modes of Operation, Interfaces, Modules, Code, Data Rates, etc.
- What is the AT command that supported CoAP GET/POST?
- How to set the socket to operate in Non Blocking mode ?
- What are the limitations in creating our own threads (tasks)?
- When using Command_Response SPI, is it necessary to use DMA on MCU side?
- Does the GainSpan module require special drivers when communicating over a host interface when usnig an external MCU host?
- What is the maximum data size GainSpan can send to HOST MCU when using Command_Response SPI?
- How dual interface works? (UART+UART/UART+SPI/UART+SDIO)?
- What are the HTTP content MIME types supported (in URI receive command)?
- Which SPI mode should be used for high throughput?
- Toggling of CS (CHIP SELECT) on SPI MASTER based on SPI mode
- Whether GS2000 sends TCP probe only when window size is zero or does it send when it is not able to transmit frames due to low window size?
- What is receive sensitivity definition?
- What is Rate Adaptation Algorithm in the GS2000?
- What is the default PHY mode on which GS2K comes up with and what is the default data rate algorithm?
- Can the SPI port on a GS2K module be a SPI master when running in S2W mode?
- Which SPI port is used for S2W on GS2K modules?
- Having difficulty with UART-command/SPI-data configuration. I get a prompt on the UART connection after power-up, but cannot enter commands? What do I do?
- What are the error messages for the L2, L3, L4 level of NCM AUTO feature?
- What AT commands use case with GSNode itself acts as the SSL server (For GS1500M as the SSL Server)?
- GSLINK with the CGI arguments parsing to the HOST MCU with AT commands?
- What is the statistic for the Roaming feature?
- How to set the socket to operate in Non Blocking mode?
- How can I achieve TCP data transmission over WiFi Direct?
- How many buffers are allocated for TCP Tx and Rx?
- There seems to be some limitation when sending data over SSL. It is stated that the maximum length of the packet size should be 1024 bytes. Is this right?
- What are the WiFi modes supported in GS2000 software?
- What is GSLink?
- Is the GS2000 capable of supporting Thread?
- Can I run embedded Linux on the GS2000?
- Does the GS2000 Module firmware support both Limited AP and Station Mode?

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